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

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 atoms has the most valence electrons?

Accepted Answer

Si

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 contains an atom that may have an incomplete octet?

Accepted Answer

BCl$$_3$$

Question 10

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

Accepted Answer

$$0$$

Question 11

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

Accepted Answer

S

Question 12

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 13

Which of the following statements is true?

Accepted Answer

$$BeF_2 is $$characterized by ionic bonding.

Question 14

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

Accepted Answer

Polar Covalent

Question 15

A student is asked to draw the Lewis dot symbol for the $$P^{3-}$$ ion. How many dots should be placed around the symbol?

Accepted Answer

8

Question 16

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

Accepted Answer

Ar

Question 17

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

Accepted Answer

They have strong electrostatic attractions between ions.

Question 18

Which of the following molecules is expected to have the largest dipole moment?

Accepted Answer

H–F

Question 19

What is the formal charge on the carbon atom in carbon monoxide ($$CO$$)?

Accepted Answer

$$-1$$

Question 20

Which of the following best describes the trend in electronegativity across a period in the periodic table?

Accepted Answer

Electronegativity increases from left to right.

Chemical Bonding and Lewis Structures: Study Notes for General Chemistry

Study Guide - Practice Questions