Chapter 2

Question 1

Isotope (Definition)

Answer 1

Atoms of the same elements that differ in mass and number of neutrons.

Question 2

Proton

Answer 2

Positively charged subatomic particle.

Question 3

Electron

Answer 3

Negatively charged subatomic particle.

Question 4

Neutron

Answer 4

Subatomic particle with no charge.

Question 5

Atomic Number (Z)

Answer 5

The number of protons in the nucleus of an atom. (also electrons in neutral atoms)

Question 6

Mass Number (A)

Answer 6

The total number of protons and neutrons in an atom.

Question 7

Ions

Answer 7

Atoms that are electrically charged with an unequal number of protons and electrons.

Question 8

Charge of an Atom (calc)

Answer 8

Protons - Electrons

Question 9

Anion

Answer 9

Atoms that gains electrons exhibiting a negative charge.

Question 10

Cation

Answer 10

Atom that loses electrons exhibiting a positive charge.

Question 11

Chemical Symbol

Answer 11

An abbreviation used to indicate an element or an atom of an element.

Question 12

Isotope (Symbol)

Answer 12

Mass Number - Superscript
Atomic Number - Subscript
2
H
1

Question 13

What is the mass of each proton and neutron?

Answer 13

~1 amu

Question 14

What is the atomic mass of a single atom in amu?

Answer 14

Approximately equal to its mass number.

Question 15

Average Mass of Isotope

Answer 15

Σ (Fractional abundance x isotopic mass)