Final Exam (7-7)

The electron configuration of a ground-state Co atom is a. [Ar]4s13d5 b. [Ar]4s23d7 c. [Ne]3s23d7 d. 1s22s22p63s23d9 e. [Ar]4s24d7

b. [Ar]4s23d7

The electron configuration of a ground-state vanadium atom is a. [Ar]4s24p3 b. [Ar]3d5 c. [Ar]4s24d3 d. [Ar]4s23d3

d. [Ar]4s23d3

The ripening of fruit, once picked, is an example of physical change. (True or False) 1

1. False

The density of a substance is an intensive property (True or False) 2

2. True

The volume of a substance is an intensive property. (True or False) 3

3. False

Boiling point and melting point are extensive properties. (True or False) 4

4. False

Rusting of a piece of iron under environmental conditions is a physical change. (True or False) 5

5. False

A dip of vanilla ice cream is a pure substance (True or False) 6

6. False

In a chemical equation, the reactants are found on the left side of the arrow (True or False) 7

7. True

Which of the following is the ground-state electron configuration of a calcium atom? a. [Ar]4s2 b. [Ar]4s13d1 c. [Ne]3s23p6 d. [Ne]3s2 e. [Ar]3d2

a. [Ar]4s2