Question 1

Which of the following elements has the greatest number of valence electrons?

Accepted Answer

Br

Question 2

What is the correct Lewis dot symbol for the phosphorus ion $$\text{P}^{3-}$$?

Accepted Answer

A symbol with 8 dots around 'P' and a $$3-$$ charge

Question 3

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

Accepted Answer

$$\text{NaBr}$$

Question 4

The strength of an ionic bond comes principally from:

Accepted Answer

The mutual attraction of opposite electrical charges

Question 5

Which of these elements is unlikely to form covalent bonds?

Accepted Answer

Ar

Question 6

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

Accepted Answer

Brittleness

Question 7

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 8

What is the periodic trend for electronegativity across a period and up a group?

Accepted Answer

Electronegativity increases moving left to right and up a group

Question 9

Calculate the difference in electronegativity values between carbon ($$2.5) $$and fluorine ($$4.0).$$

Accepted Answer

$$1.5$$

Question 10

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

Accepted Answer

$$\text{Cl-F}$$

Question 11

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

Accepted Answer

Polar Covalent

Question 12

How many shared electrons are around the oxygen atom in the molecule $$\ce{H2CO}$$?

Accepted Answer

6

Question 13

Which of the following atoms has the most valence electrons?

Accepted Answer

N

Question 14

How many octet electrons are around the phosphorus atom in the following compound $$\ce{PH4^+}$$?

Accepted Answer

8

Question 15

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

Accepted Answer

$$\ce{BCl3}$$

Question 16

Determine the formal charge of the nitrogen atom found within the ammonia molecule, $$\ce{NH3}.$$

Accepted Answer

$$0$$

Question 17

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

Accepted Answer

$$-1$$

Question 18

Based on calculated formal charges, determine the overall charge (net charge) for the following compound $$\ce{CO3$$^{2-}$$}.$$

Accepted Answer

$$-2$$

Question 19

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

Accepted Answer

N

Chemical Bonding and Lewis Structures: Study Notes for General Chemistry

Study Guide - Practice Questions