Question 1 The chemical name for table salt is sodium chloride, or simply NaCl. What type of chemical is NaCl?

Compound

Ion

Element

Molecule

 
Question 2 While the maximum number of electrons required to fill the outermost shell of an atom varies depending on the size of the atom, almost all of the smaller atoms (atomic numbers 2-20) are considered stable (nonreactive) when they contain ________ electron(s) in the outermost shell.

1

8

16

2

 
Question 3 Which number represents the atomic weight of carbon?

6

18

12

Not enough information given

 
Question 4 How many neutrons are in a typical carbon atom?

12

6

18

Not enough information given

 
Question 5 What is the most common element in your body?

Sugar

Carbon

Oxygen

Water

 
Question 6 The octet rule states that the outermost shell (valence) can hold up to ___ electrons

8

3

2

4
 
Question 7 The typical carbon atom is described in the periodic table by the accompanying box. How many protons are in a typical carbon atom?

18

6

12

Not enough information given

 

Question 8 Identify the reactants in the following chemical reaction: C₁₀H₈ + 12 O₂ → 10 CO₂ + 4 H₂O

10 CO₂ and 4 H₂O

C₁₀H₈ and 12 O₂

C₁₀H₈ and 10 CO₂

12 O₂ and 4 H₂O

 
Question 9 Identify the part of the atom that most determines the chemical reactivity of the atom.

The number of neutrons

The number of electrons

The number of shells

The number of protons

 
Question 10 Which is not one of the four atoms that make up the bulk of living organisms?

Nitrogen

Oxygen

Calcium

Carbon