Why are elements classified?​

Answers

Answer 1
Because it helps us to predict the properties of the elements and their compounds based on their positions in the Periodic Table.

Related Questions

What is the name of cuo? explain how you determined the bond type and the steps you used to determine the naming convention for the compound.

Answers

The name of CuO is Copper(II) oxide have the two most common oxidation states of copper are +2 and +1.

What is copper oxide used for?

Copper oxide is a trace element for the zootechnical and agricultural sector. Cupric oxide is also used as a raw material for the production of catalysts and pigments in the field of ceramics, glass and plastics.

This compound makes two different types of bonds being the hydrogen bond when it's a hydrogen and covalent bond when we have an oxygen or a nitrogen.

See more about Copper(II) oxide at brainly.com/question/24217869

#SPJ1

283.5 g of tin was heated from 25.6 to 107.5°C. How much energy was used to heat tin? (Specific heat capacity of Sn is 0.222 J/g x °C)

Answers

Answer: 5150 J

Explanation:

[tex]Q=mc \Delta T\\\\Q=(283.5)(0.222)(107.5-25.6)\\\\Q \approx \boxed{5150 \text{ J}}[/tex]

Engineers are trying to improve a race car. Their goal is to increase the acceleration of the car using the same engine. Which change shows the best application of Newton’s laws of motion to achieve this goal?

increasing the inertia of the car
decreasing the reaction force
increasing the action force
decreasing the mass of the car

Answers

If the engineers are trying to increase the acceleration of the car, they have to decrease the mass of the car.

What is Newtons law?

The Newtons laws of motion form the basis of the discussion about motion. We know that from the second law of Newton F = ma

Thus, if the engineers are trying to increase the acceleration of the car, they have to decrease the mass of the car.

Learn more about Newton's law:https://brainly.com/question/27573481

#SPJ1

Question 2
1 p
White phosphorus ignites easily. This is an example of _____ property

- physical
- neither
- chemical
- both

Answers

Answer:

Chemical properties because if it was physical property then it will glow in dark

Based on the activity series provided, which reactants will form products? f > cl > br > i cui2 br2 right arrow. cl2 alf3 right arrow. br2 nacl right arrow. cuf2 i2

Answers

The reactants that will form products will be [tex]2CuI_2 + Br2[/tex].

Activity series

Elements at higher positions in the activity series will be able to displace those in lower positions in solutions.

Thus:

[tex]2CuI_2 + Br2 --- > 2CuBr +2 I_2[/tex] because Br is higher than I in the activity series.

Cl cannot displace F in [tex]Cl2 + AlF_3[/tex] because F is higher than Cl in the activity series.

Also, Cl is higher than Br in the activity series, thus, the reaction [tex]Br_2 + NaCl[/tex] cannot form products.

I cannot displace F, thus, [tex]CuF_2 + I_2[/tex] cannot form products.

More on activity series can be found here: https://brainly.com/question/13934381

#SPJ1

Select all the correct answers.
A red-hot iron nail is immersed in a large bucket of water. Although the nail cools down sufficiently to be held bare-handed, the temperature of the water barely increases. Which properties keep the water temperature from changing much?

Answers

The  properties which keep the water temperature from changing much are;

water's high specific heat capacitythe large mass of waterWhat is specific heat capacity?

The specific heat capacity is the property of a substance that shows how much its temperature changes when it is exposed to heat.

Thus, the  properties which keep the water temperature from changing much are;

water's high specific heat capacitythe large mass of water

Missing parts:

A red-hot iron nail is immersed in a large bucket of water. Although the nail cools down sufficiently to be held bare-handed, the temperature of the water barely increases. Which properties keep the water temperature from changing much?

A.) water's high heat conductivity

B.) water's high specific heat capacity

C.) the iron nail's high heat conductivity

D.) the large mass of water

E.) the iron nail's high specific heat capacity

Learn more about heat capacity:https://brainly.com/question/12244241

#SPJ1

Answer: waters high specific heat capacity the large mass of water

Explanation:

i got it right

Is Hibiscus tea good for ACNE?

Answers

Answer:

Y E S

Explanation:

Hibiscus tea has plenty of skin care qualities, from helping your natural levels of collagen and elastin to reducing breakouts to balancing oil production. Hibiscus is known for its rich level of antioxidants, including vitamin C and beta-carotene.

I hope this helps ✍(◔◡◔)

Yes it could be but make sure you don’t have alragees

What do esters aldehydes and ketones all have in common? (Look back at
table R and be specific!)

Answers

They all have carbon and oxygen atoms.

If the half-life of a radioactive group of atoms is 100 years, then how old is the rock if there have been two half-lives? show your work

Answers

The rock will be 200 years old if there have been two half-lives.

What is the half life ?

The half-life  of a radioactive isotope refers to its decay period, which is the average lifetime of an atom before it disintegrates.

In this question (t½) of rock is 100 years, which means that after 100 years half of the sample would have decayed and half would be left as it is.

after two half lives or 200 years , the rock will be 200 years old.

To know more about Half Life

https://brainly.com/question/4318844

#SPJ4

Compare and contrast nuetrons,protons, and electrons​

Answers

Neutrons- no charge protons -positive electrons -negative

Could someone explain this for me I don't understand?​

Answers

Answer:

Ok so I assume they gave u a reaction before asking this question. Look at that reaction and try to figure out what substances are changing in valency, if there is a substance(s) that doesn't change its valency then it's a spectator ion.

A sample of radioactive waste has a half-live of 40 years and an activity level of 4 curies. After how many years will the activity level of this sample be 0. 5 curies?

Answers

After 160 years, the activity level of the sample will be 0.5 curies.

What is half-life?

Half life of any radioactive waste is the half decay of that product.

The formula is [tex]\dfrac{\lambda }{\lambda_1} = 2^\dfrac{a}{b}[/tex]

Where, λ is 4 cruies

λ1 is 0.5 cruies

b = 40 years

Putting the values in the equation

[tex]\dfrac{4}{0.5} = 2^\dfrac{a}{40}\\\\\\\dfrac{a}{40} = 4\\ = 160 years[/tex]

Thus, the correct option is 160 years.

Learn more about half-life

https://brainly.com/question/24710827

#SPJ4


What is the change in the freezing point of water when 35.0 g of sucrose is
dissolved in 300.0 g of water?

Kf of water = -1.86°C/mol
molar mass sucrose = 342.30 g/mol
ivalue of sugar = 1

A. -0.183°C
B. 0.0606 °C
C. 0.217°C
D. -0.634°C

Answers

From the calculations, we can see that, the change in the freezing point is -0.634°C.

What is freezing point?

The term freezing point refers to the temperature at which a liquid is changed to solid.

Given that;

ΔT = K  m i

Number of moles sucrose = 35.0 g/ 342.30 g/mol = 0.1 moles

molality =  0.1 moles/ 300.0 * 10^-3 Kg

= 0.33 m

Thus;

ΔT = -1.86°C/mol *  0.33 m * 1

= -0.634°C

Learn more about freezing point:https://brainly.com/question/3121416

#SPJ1

Hereditary information is stored inside the

Answers

Answer:Hereditary information is contained in genes, located in the chromosomes of each cell. Each gene carries a single unit of information. An inherited trait of an individual can be determined by one or many genes, and a single gene can influence more than one trait.

Explanation:

Use the following equation to answer the following question
3 H2 + Na2 —-> 2 NH3

a) Determine the limiting reactant when 5.78 g of H2, and 6.28 g N2 are reacted to make NH3 you expect to get out of the chemical reaction.

Answers

Answer: nitrogen

Explanation:

Converting 5.78 g of hydrogen to moles, we know that the formula mass of hydrogen is about 2(1.00794)=2.01588 g/mol, so 5.78 grams is about 5.78/2.01588=2.867 mol.Converting 6.28 g of nitrogen to moles, we know that the formula mass of nitrogen is about 2(14.0067)=28.0134 g/mol, so 6.28 grams is about 6.28/28.0134 = 0.22417 mol.

From the equation, we know that for every 3 moles of hydrogen consumed, 1 mole of nitrogen is consumed.

Considering the hydrogen, the reaction can occur 2.867/3=0.955 times.Considering the nitrogen, the reaction can occur 0.22417 times.

Therefore, nitrogen is the limiting reactant.

Submit the answers to the checkpoint questions in the text box with the Lesson Review.
Part A Checkpoint
Directions: Complete each of the following questions.
(PICTURE FOR THE FIRST QUESTION)

1. Indicate the kind of energy represented in each example below:
a. Burning fuel in a car
b. Exploding an atomic bomb
c. Current moving in a wire
d. Tires sliding on pavement when brakes are applied
e. Football player running for a touchdown

2. All forms of energy except nuclear fission come from the _________.



3. Energy is ______________.

Answers

Burning fuel in a car is chemical energy.Exploding an atomic bomb produces thermal energy.Current moving in a wire has kinetic energy.Tires sliding on the pavement when brakes are applied produces thermal energy.A football player running for a touchdown. A generator converts mechanical energy to energy.All forms of energy except nuclear fission come from the sun.Energy is the ability to do work.

What is energy?

Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.

The detonation of an atomic bomb releases enormous amounts of thermal energy, or heat, achieving temperatures of several million degrees in the exploding bomb itself. This thermal energy creates a large fireball, the heat of which can ignite ground fires that can incinerate an entire small city.

When the circuit is complete, there is a flow of charge (electric current). The electrons moving through the wire transfer energy to the wire in the form of heat. The particles in the wire, therefore, have more kinetic energy and so the temperature increases.

Learn more about the energy here:

https://brainly.com/question/17858145

#SPJ1

Answer:ss

Explanation:ss

Are these structure form a week bases?​

Answers

Answer:

Explanation:

I have only answered the blue boxed parts:

Amines are weak bases because they can accept protons from other things.

Sugars is neither acidic nor basic (cuz its not ionic)

Carboxylic acid are weak acids (not bases) cuz they donate protons to other things.

What kind of scientist would study how mistletoe harms trees

Answers

Answer:

A Dendrologist! They are the type of Scientist that studie trees.

Match the phase to the correct definition.
1.
Anaphase
2.
Prophase
3.
Metaphase
4.
Telophase
a.
Chromosomes line up at the center of the cell.
b.
The DNA is organized into connected rods called chromosomes.
c.
New cells begin to form.
d.
The chromosomes are separated and move to opposite sides of the cell.

Answers

Answer:

1.) Anaphase ------> D.) The chromosomes are separated and move to opposite sides of the cell.

2.) Prophase -------> B.) The DNA is organized into connected rods called chromosomes.

3.) Metaphase -------> A.) Chromosomes line up at the center of the cell.

4.) Telophase ------> C.) New cells begin to form.

In a mixture of oxygen and nitrogen, 80% of the gas pressure is exerted by the nitrogen. if the total pressure is 2.0 atm, what pressure does the oxygen exert?

Answers

0.4 atm pressure exerted by oxygen if 80% of the gas pressure is exerted by the nitrogen.

What is pressure?

Pressure is defined to be the amount of force exerted per area

80% of pressure is exerted by nitrogen gas.

So, 20% of pressure will be exerted by oxygen gas.

20% of 2.0 atm = 0.4 atm

Hence, 0.4 atm pressure exerted by oxygen if 80% of the gas pressure is exerted by the nitrogen.

Learn more about pressure here:

https://brainly.com/question/15175692

#SPJ1

What is a chemical property? Give an example.

Answers

Answer:

A chemical property example is fire.

Explanation:

Hope this helps!

A chemical property is any kind of property becomes evident during or after a chemical reaction; aka a quality of a material that only becomes evident through changing that material's chemical identity. an example would be flammability or chemical stability.

list three properties of water that are related to hydrogen bonding

Answers

Cohesion, Adhesion and high surface tension.


what is the wavelength of an electromagnetic wave that has a frequency of
1.82 x 1018 hz in a vacuum? (the speed of light in a vacuum is 3.00 x 108
m/s.)

Answers

The wavelength of an electromagnetic wave that has a frequency of 1.82 x 10¹⁸ Hz in a vacuum is 1.65 × [tex]10^{-10}[/tex]m.

How to calculate wavelength?

The wavelength of a wave can be calculated by dividing the speed of the wave by its frequency.

According to this question, a wave has a frequency of 1.82 x 10¹⁸ Hz in a vacuum and speed of light in a vacuum is 3.00 × 10⁸ m/s.

λ = [tex]\frac{v}{f}[/tex]

Wavelength (λ) = 3 × 10⁸ ÷ 1.82 × 10¹⁸

Wavelength (λ) = 1.65 × [tex]10^{-10}[/tex] m

Therefore, the wavelength of an electromagnetic wave that has a frequency of 1.82 x 10¹⁸ Hz in a vacuum is 1.65 × [tex]10^{-10}[/tex]m.

Learn more about wavelength here:

https://brainly.com/question/13533093

#SPJ1

Fatty acids can be ____________ , meaning they contain double bonds, or they can be ____________ , meaning they contain no double bonds

Answers

unsaturated, saturated

which of the following with the kinetic theory address? a
A. Vibrations in molecules
B. Oxidation states of Adams
C. Shapes of molecules
D. Energy levels and electrons

Answers

Answer:A

Explanation:

The kinetic molecular theory of matter states that: Matter is made up of particles that are constantly moving. All particles have energy, but the energy varies depending on the temperature the sample of matter is in.This is turn determines shearer the substance exists in the solid, liquid, or gaseous state.

Based on table n, uranium-238 and uranium-235 have different
a)decay modes
b)half lives
c)number of protons
d)number of electrons

Answers

According to table N, the isotopes uranium-238 and uranium-235 have different half lives.

What are radioactive nuclides?

Radioactive nuclides are those nuclides that are able to undergo radioactive decay. They have specific modes of decay that is peculiar to each isotope.

Hence, according to table N, the isotopes uranium-238 and uranium-235 have different half lives.

Learn more about uranium-238:https://brainly.com/question/9099776

#SPJ1

Match the following terms:

Answers

Answer:

See below ~

Explanation:

A to B

Solid Phase

==========================================================

B to C

Melting

==========================================================

C to D

Liquid Phase

==========================================================

D to E

Vaporizing

============================================================

E to F and beyond

Gas Phase

Calculate the molarity of a Ba(OH)2 solution if 1950 mL is completely titrated by 26.1 mL of 0.505 M HNO3

Answers

Answer: 0.01 M

Explanation:

[tex]M_{A}V_{A}=M_{B}V_{B}\\(26.1)(0.505)=(1950)M_{B}\\M_{B}=\frac{(26.1)(0.505)}{1950} \approx \boxed{0.01 \text{ M}}[/tex]

Can someone help??. This is super hard

Answers

111 cchuyttrfgh

tyujklkjhgt

What volume of a 0.295 M nitric acid solution is required to neutralize 24.8 mL of a 0.107 M potassium hydroxide solution

Answers

Answer: 9.00 mL

Explanation:

[tex]M_{A}V_{A}=M_{B}V_{B}\\(0.295)V_{A}=(0.107)(24.8)\\V_{A}=\frac{(0.107)(24.8)}{(0.295)} \approx \boxed{9.00 \text{ mL}}[/tex]

Other Questions
what are the applications of Statistics in field of agribusiness? Please HelpUse the probability distribution table to answer the question. X / P0 / 0.031 / 0.132 / 0.703 / 0.104 / 0.04What is P(2 On an N F L football helmet is a sticker that reads "Surgeon General's warning: retire."Which element of the cartoon best supports the perspective that football is dangerous?the surgeon generals warningthe protective guard on the helmetthe color of the stripes on the helmetthe helmets position away from the reader David's phone battery level drops 6 percentage points each hour when he is not playing a game on it. When David does play a game on his phone, the phone battery level drops 18 percentage points each hour. On a particular day, the phone battery level was at 100 percentage points at 12:00 noon and at 22 percentage points at 6:00 P.M. If David did not charge his phone during this time, how many hours did he spend playing the game between 12:00 noon and 6:00 P.M. on that day Can you help me solve this equation I been trying to search a video explaining this but nothing and I gaved up studying for six days and now I am trying to get back to track anyways ... The equation is a linear equation : f(x)=-x-11 with the following1.4f(-2)+5f(1)2.-5f(12)-2f(-9)3. 3f(5)x f(2)4.f(9)/f(-6) In 9th grade Jade started a college fund with$15,000 at a rate of 6.3% compounded bi-annually. How much money will she have in 4years? Which text features provide additional information about details in a text? (A) subtitles (B)footnotes and endnotes (C)charts and graphs (D)bulleted lists A neutral atom of Sodium (Na) has an atomic number of 11 and an atomic mass of 23. Therefore, Na has _________________________ protons. What is the surface area in square inches of a basketball that has a diameter of 9 inches What is the equation of the line that passes through the point (5,3) and has a slope of -1/5 ? name the marked angle two different ways Pls help me with my math If f(x) = 3x - 4 and g(x) = x+2, find (f - g)(x). How long does it take a lemon tree to produce fruit. In the religion of the ancient Greeks...a.the kings were thought to be godsb. a priestly class dominated the governmentc.people thought the gods were like humans in many waysd.strict rules separated religion from government True or false: f(x) represents a function.A. True B. False Read the excerpt from Panic in Washington Square Park.The only obstacle keeping Cassandra from fully enjoying the beauty of this glorious day was her mother's absence. Every Wednesday afternoon, Cam, their golden retriever, joined the Doggy Daycare group for an afternoon in Washington Square Park. During that time, Cassandra and her mother spent time together by seeing a Broadway performance, munching on delicacies from a food truck, or walking through a public park. Afterward, Cassandra waited for five minutes by the fountain, while her mother, Carol, picked up Cam from the dog run. She always took this time to enjoy the beautiful day and watch all of the interesting people. Cassandra's brow furrowed as she looked at her watch. Her mother had departed to retrieve their furry pet over twenty minutes ago, an unprecedented amount of time, even for her mother.Cassandra gazed toward the location of the dog park. If her mother or Cam were in trouble, Cassandra needed to help. She strode toward the area for canines with purposeful, determined steps. The air was cooler under the shade of the park's trees. The closer Cassandra got to the dog park, the louder the barks of the dogs became. One noise rose above the rest as she got closer to the dog run.How do the events in the first paragraph contribute to the reader's understanding of Cassandra's actions in the next paragraph?AnswersA Cassandra ate delicacies from a food truck, which led to her decision to leave the park and go get more. B Cassandra got too much sun, which led to her decision to stand in the shade of the trees, away from the fountain.C Cassandra picked up Cam from the dog run, which led to her decision to find Carol and take Cam for a quick walk.D Cassandra realized that her mother was taking too long to pick up Cam, which led to her decision to go help. This figure represents a small collectible box. Vicki wants to cover 45 of the surface with glitter.How much of the total surface will be covered with glitter?Enter your answer as a decimal or mixed number in simplest form in the box. cmRight trapezoidal prism. The height of the trapezoid base is labeled 4 centimeters. The larger base is labeled 6 and 1 half centimeters, and the shorter base is 5 and 1 fourth centimeters. The two legs of the trapezoid are labeled 4 centimeters and 4 and 1 fifth centimeters. The height of the prism is labeled 9 centimeters.PLease helpppp!! only have 2 minutesd how to write an essay about your country in french justify whether the solution makes sense.a. Are the two triangles similar? b. How do you know? Justify.