Unit 1: Atomic Structure Practice Quiz

The number "18" in the periodic table square shows:

• atomic mass.

• atomic number.

• elemental name.

• elemental symbol.

Atoms of the same element must always have the same number of

• Electrons

• Isotopes

• Neutrons

• Protons

The _______ of an elements equals the number of protons in an atom of that element

• Mass Number

• Atomic Number

• Atomic Weight

• Isotopes

Adding or subtracting neutrons changes the atom into an...

• ion
• isotope
• neutral atom

The atomic mass is equal to _.

• the number of protons only
• the number of neutrons only
• the total number of protons and neutrons
• the number of protons, neutrons, and electrons.

How many protons does this isotope of titanium have?

• 48
• 22
• 26
• 70

Tags

NGSS.MS-PS1-1

What charge does an atom have when it GAINS electrons?

• Positive

• Negative

• Neutral

How many electrons does this magnesium ion have?

• 24

• 12

• 10

• 14

Tags

NGSS.MS-PS1-1

How many protons, neutrons, and electrons?

• proton = 16, neutron = 8, electron = 10

• proton = 8, neutron = 16, electron = 8

• proton = 8, neutron = 8, electron = 10

• proton = 6, neutron = 2, electron = 6

Tags

NGSS.MS-PS1-1

Two atoms that have different numbers of protons are 

• Different ions
• Different isotopes
• Different elements