Chapter 2

Question 1

Atom

Answer 1

structural unit of an element, smallest form that retains the chemical/psychical properties of that element.

Question 2

Protons

Answer 2

Positively charged.

Question 3

Neutrons

Answer 3

Neutral charge (no charge).

Question 4

Electrons

Answer 4

Negative charge (electron cloud) =almost all volume.

Question 5

Nucleus

Answer 5

Small dense region in the center, positively charged =almost all mass.

Question 6

amu

Answer 6

Atomic mass unit

Question 7

Nuclide

Answer 7

Specific atom with unique number of protons and neutrons.

Question 8

Mass Number

Answer 8

Number of protons and Number of neutrons.

Question 9

Element Symbol

Answer 9

Found on the periodic table.

Question 10

Atomic number

Answer 10

Number of protons and defines the element.

Question 11

Charge

Answer 11

Difference in number of electrons (1+,1-).