Chapter 2

Question 1

Chemistry

Answer 1

Study of matter

Question 2

Matter

Answer 2

Anything that takes up space and has mass

Question 3

Mass

Answer 3

Quantity of material in matter. On Earth, mass is equivalent to weight.

Question 4

Atom

Answer 4

Smallest units of matter.

Composed of subatomic particles: protons, neutrons, and electrons

Question 5

Protons

Answer 5

Positive electrical charge

Question 6

Neutrons

Answer 6

Electrically neutral

Question 7

Electrons

Answer 7

Negative electrical charge

Much smaller than protons and neutrons

Question 8

Protons and neutrons are located in

Answer 8

The nucleus

Question 9

Electrons are located

Answer 9

Outside the nucleus of an atom

Question 10

An atom can be divided into:

Answer 10

A nucleus (protons and neutrons) and electron cloud (electrons)

Question 11

Atoms contain

Answer 11

equal numbers of protons and neutrons

Question 12

Atomic number

Answer 12

Total number of protons in an atom

Question 13

Mass number

Answer 13

total number of protons and neutrons in an atom

Question 14

Element

Answer 14

Substance composed only of atoms with the same atomic number ex. Hydrogen

Question 15

Hydrogen

Answer 15

Simplest atom

Atomic number 1 (1 proton, 1 electron)

Question 16

Isotopes

Answer 16

Atoms with same number of protons, but different numbers of neutrons.