Helium (He) and neon (Ne) are elements in Group 8A of the periodic table. How do the electron dot diagrams of these elements compare?

The electron dot diagram of helium has six fewer dots than the electron dot diagram of neon.
The electron dot diagram of helium has eight fewer dots than the electron dot diagram of neon.
Both the electron dot diagram of helium and the electron dot diagram of neon have two dots.
Both the electron dot diagram of helium and the electron dot diagram of neon have eight dots.

Answer:

66326.8 g Os

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

2.1 × 10²⁶ atoms Os

Step 2: Identify Conversions

Avogadro's Number

Molar Mass of Os - 190.2 g/mol

Step 3: Convert

[tex]2.1 \cdot 10^{26} \ atoms \ Os(\frac{1 \ mol \ Os}{6.022 \cdot 10^{23} \ atoms \ Os} )(\frac{190.2 \ g \ Os}{1 \ mol \ Os} )[/tex] = 66326.8 g Os

Step 4: Check

We are given 2 sig figs. Follow sig fig rules and round.

66326.8 g Os ≈ 66000 g Os

Ionic Bonding (the transfer of valence electrons)

Answer:

Ok:

Explanation:

Sodium gives fluorine an electron. This is in part due to electronegativity differences because sodium likes to lose an electron and fluorine likes to gain. As a result, sodium and become positively charged and fluorine negatively charged. This will for electrostatic attraction and the sodium and fluorine will form a bond. This bond is called an ionic bond.

Answer:

wouldn't it be 52

Explanation:

Answer:

2D refers to the term “two-dimensional.”

3D refers to the term “three-dimensional.”

Explanation:

Circle, triangle, square, rectangle, and pentagon are some of the most common examples of 2D shapes.

Cylinder, pyramid, cube, and prism are some of the most common examples of 3D shapes.

Answer:

Explanation:This unequal distribution of electrons is known as a polar covalent bond, characterized by a partial positive charge on one atom and a partial negative charge on the other. The atom that attracts the electrons more strongly acquires the partial negative charge and vice versa.

Answer:B

Explanation:

Answer:

3.87 mol N

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

54.2 g N

Step 2: Identify Conversions

Molar Mass of N - 14.01 g/mol

Step 3: Convert

[tex]54.2 \ g \ N(\frac{1 \ mol \ N}{14.01 \ g \ N} )[/tex] = 3.86867 mol N

Step 4: Check

We are given 3 sig figs. Follow sig fig rules and round.

3.86867 mol N ≈ 3.87 mol N

Answer:

approximately 27 days

Explanation:

Answer:

C . 24 L

Explanation:

Given data:

Initial volume of gas = 20.0 L

Initial pressure of gas = 660 mmHg

Final volume = ?

Final pressure = 550 mmHg

Solution:

The given problem will be solved through the Boly's law,

"The volume of given amount of gas is inversely proportional to its pressure by keeping the temperature and number of moles constant"

Mathematical expression:

P₁V₁ = P₂V₂

P₁ = Initial pressure

V₁ = initial volume

P₂ = final pressure

V₂ = final volume  

Now we will put the values in formula,

P₁V₁ = P₂V₂

660 mmHg × 20.0 L = 550 mmHg × V₂

V₂ = 13200 mmHg. L/ 550 mmHg

V₂ = 24 L

Answer: It is a

Explanation:

Answer:

In explanation,

Explanation:

Tests of Big Bang: The CMB. The Big Bang theory predicts that the early universe was a very hot place and that as it expands, the gas within it cools. Thus the universe should be filled with radiation that is literally the remnant heat left over from the Big Bang, called the “cosmic microwave background", or CMB.

Answer:

covalent bonds............

covalent bonds

Ionic bonds structure when a nonmetal and a steel alternate electrons, while covalent bonds form when electrons are shared between two nonmetals. An ionic bond is a type of chemical bond formed through an electrostatic enchantment between two oppositely charged ions.

Answer:

Na

Explanation:

On the periodic table, the atomic radius of an atom typically decreases when going from left to right and increases when going from top to bottom.

Answer:

C

Explanation:

Answer:

NaCl

Explanation:

Because it's sodium chloride

Answer:

My guess is b or c but its robably wrong

Explanation:

I just also need points sorry <3

Effusion refers to the movement of a gas through a small hole. It is different from diffusion which involves the movement of a gas from a region of higher concentration to a region of lower concentration.

The effusion of a gas is described by Graham's law. According to Graham's law, the rate of effusion of a gas is inversely proportional to the square root of the molar mass of the gas.

The following are true regarding the effusion of a gas;

Learn more: https://brainly.com/question/8804761

Answer:

Explanation:

Ba( OH)₂ + 2HCl = BaCl₂ + 2H₂O .

75.5 mL of 0.247 M barium hydroxide = .0755  x .247 = .01864 moles

95.0 mL of 0.330 M HCl = .095 x .33 = .03135 moles

mole ratio of  hydrochloric acid to barium hydroxide

= .03135 /  .01864 = 1.68

theoretical ratio = 2 /1 = 2

As the theoretical ratio is more , therefore HCl is the limiting reactant  .

Answer:

This equation is a double reaction

Explanation:

I hope this is the answer

Answer:

ca(OH)2 is the base and CaCI2 is the salt

Explanation:

Answer:

please mark as brainliest

Explanation:

ans: Gas

The particles of matter in the gaseous state are neither close together nor fixed in place. The gas expands to fill its container. Thus, a given number of particles will have the greatest volume in the gas state.30‏/06‏/2014

Answer:

Both the motion of the particles in the substance and the temperature of the substance increase.

Answer The motion of the particles in the substance increases, and the temperature of the substance decreases.  

Explanation:

Bunsen burner is an instrument which is used as a source of heat using natural gas or petrol. It is used for the heating, sterlization, and combustion. Bunsen burner is named after its inventor Robert bunsen.

Burner provide a single, continuous flame by mixing gas with air in a controlled fashion. The ratio of gas to air that is mixed together can be manually adjusted, allowing the user to control the intensity, temperature, and size of the flame.

2Mg(s)+O₂(g)⇒2MgO(s)

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.

2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product

3. Select the coefficient of the substance with the most complex chemical formula equal to 1

Reaction(syntesis / combination)

Mg(s)+O₂(g)⇒MgO(s)

give coefficient

aMg(s)+bO₂(g)⇒MgO(s)

Mg, left=a, right 1⇒a=1

O,left=2b,right 1⇒2b=1,b=0.5

Mg(s)+0.5O₂(g)⇒MgO(s) x 2

2Mg(s)+O₂(g)⇒2MgO(s)

Answer:

eat well, stay well, and have fun ∛π⇅πΔΔΔ≅≅⇵↑↓∫∫↑

Explanation:

Answer:

Chemical element symbols are one- and two-letter abbreviations for the element names. They are used to make the periodic table and chemical formulas easier to read. You can combine the symbols to make words. Here is a list of English words made from periodic table element symbols. There are thousands of words that can be written using these symbols, so experiment to see if you can write your name or fun messages that show your chemistry savvy.

Answer:

i dont get your question Man

In mathematics, a set is a well-defined collection of distinct objects

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Answer:

1. It is a covalent bond and all covalent bonds have low melting points

Explanation:

Answer:

Na2O

explanation.

Ionic bonds refers to complete transfer of electrons from one atom to another