Question 1

Which of the following elements will possess the most valence electrons?

Accepted Answer

Br

Question 2

How many valence electrons are present in a phosphorus atom (P) in its ground state?

Accepted Answer

5

Question 3

Which of the following species has bonds with the most ionic character?

Accepted Answer

SrCl$$_2$$

Question 4

Which of the following is NOT a physical property attributed to metallic bonding?

Accepted Answer

Brittleness

Question 5

Calculate the difference in electronegativity values between carbon and fluorine. (Given: $$EN_{C} = 2.5$$, $$EN_{F} = 4.0)$$

Accepted Answer

1.5

Question 6

For those listed below, which has the most polar bond?

Accepted Answer

S–O

Question 7

Which of the following correctly identifies the chemical bond between a carbon and oxygen atom?

Accepted Answer

Polar Covalent

Question 8

How many shared electrons are around the oxygen atom in the Lewis structure of carbon dioxide ($$CO_2$$)?

Accepted Answer

6

Question 9

Which of the following atoms has the most valence electrons?

Accepted Answer

Si

Question 10

How many octet electrons are around the phosphorus atom in the following compound: $$\mathrm{PCl}_5$$?

Accepted Answer

10

Question 11

Which of the following contains an atom that may have an incomplete octet?

Accepted Answer

BCl$$_3$$

Question 12

Determine the formal charge of the nitrogen atom found within the ammonia molecule, $$NH_3.$$

Accepted Answer

$$0$$

Question 13

Calculate the formal charge of the carbon atom within a carbon monoxide molecule ($$CO).$$

Accepted Answer

$$-1$$

Question 14

Based on calculated formal charges, determine the overall charge (net charge) for the carbonate ion ($$CO_3$$^{2-}$$).

Accepted Answer

$$-2$$

Question 15

Which element within the thiocyanate ion ($$SCN^-) $$possesses a negative charge?

Accepted Answer

N

Question 16

Which of the following best describes the free-flowing electrons in metallic bonding?

Accepted Answer

Valence electrons that can move freely between metal ions.

Question 17

Which of the following statements is true?

Accepted Answer

$$BeF_2 is $$characterized by ionic bonding.

Question 18

Which of the following elements is unlikely to form covalent bonds?

Accepted Answer

Ar

Question 19

Arrange the following molecules in order of decreasing dipole moment: H–I, H–F, H–Br, H–Cl.

Accepted Answer

H–F \u003e H–Cl \u003e H–Br \u003e H–I

Question 20

Which of the following best explains why ionic compounds tend to have high melting points?

Accepted Answer

They have strong electrostatic attractions between ions.

Chemical Bonding and Lewis Structures: Study Notes for General Chemistry

Study Guide - Practice Questions