Atoms, Ions, and Molecules

Question 1

_____ is the number of protons in the nucleus.

Answer 1

Atomic Number (Z)

Question 2

_____ is the total number of protons and electrons in an element.

Answer 2

Mass Number

Question 3

For neutral atoms, the number of protons is equal to the number of _____.

Answer 3

Electrons

Question 4

For ions, the number of protons is equal to the number of _____.

Answer 4

Electrons - (Charge)

Question 5

Alkali Metals

Answer 5

H = Hydrogen
Li = Lithium
Na = Sodium
K = Potassium
Rb = Rubidium
Cs = Caesium
Fr = Francium

Question 6

Alkali Earth Metals

Answer 6

Be = Beryllium
Mg = Magnesium
Ca = Calcium
Sr = Strontium
Ba = Barium
Ra = Radium

Question 7

Icosagens

Answer 7

B = Boron
Al = Aluminum
Ga = Gallium
In = Indium
Tl = Thallium

Question 8

The group of elements with a complete number of valence electrons.

Answer 8

Noble gases

Question 9

A _____ is an aggregate of two or more atoms in a definite arrangement held together by chemical forces.

Answer 9

Molecule

Question 10

A _____ is a molecule that contains only two atoms.

Answer 10

Diatomic molecule

Question 11

A _____ is an atom, or group of atoms, that has a net positive or negative charge.

Answer 11

Ion

Question 12

_____ - ion with a positive charge, a neutral atom loses one or more electrons

_____ - ion with a negative charge, a neutral atom gains one or more electrons

Answer 12

cation, anion

Question 13

A _____ ion contains more than one atom.

Answer 13

Polyatomic ion