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 neutral atom of phosphorus (P)?

Accepted Answer

5

Question 3

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

Accepted Answer

SrO

Question 4

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

Accepted Answer

Brittleness

Question 5

Which of the following statements is true?

Accepted Answer

BeF2 is characterized by ionic bonding.

Question 6

Calculate the difference in electronegativity values between carbon and fluorine. (Given: EN of C = 2.5, EN of F = 4.0)

Accepted Answer

$$1.5$$

Question 7

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 8

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

Accepted Answer

S–F

Question 9

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

Accepted Answer

Polar Covalent

Question 10

How many shared electrons are around the oxygen atom in the Lewis structure of CO2?

Accepted Answer

6

Question 11

Which of the following atoms has the most valence electrons?

Accepted Answer

N

Question 12

How many octet electrons are around the phosphorus atom in the following compound: $$\mathrm{$$PCl_5$$}$$?

Accepted Answer

10

Question 13

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

Accepted Answer

BCl3

Question 14

Determine the formal charge of the nitrogen atom found within the ammonia molecule, $$\mathrm{NH_3$}.$$

Accepted Answer

$$0$$

Question 15

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

Accepted Answer

$$-1$$

Question 16

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

Accepted Answer

$$-2$$

Question 17

Which element within the thiocyanate ion ($$\mathrm{NCS^-}) $$possesses a negative charge?

Accepted Answer

S

Question 18

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 19

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

Accepted Answer

Ar

Question 20

Which of the following statements is true regarding electronegativity trends in the periodic table?

Accepted Answer

Electronegativity increases from left to right across a period and up a group.

Chemical Bonding and Lewis Structures: Study Notes

Study Guide - Practice Questions