Ions and Isotopes

What charge does an atom have when it GAINS electrons?

• Positive

• Negative

• Neutral

Adding or subtracting neutrons (charge = 0, mass = 1) makes the element change into an...

• ion
• mixture
• isotope
• neutral atom

Tags

NGSS.HS-PS1-8

The atomic number is equal to _.

• the number of protons and electrons
• 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? Hint titanium has an atomic number of 22.

• 48
• 22
• 26
• 70

Tags

NGSS.MS-PS1-1

What is the atomic number of Fe? (click to see image)

• 26
• 55.845
• 56
• None of these

Tags

NGSS.HS-PS1-1

Negative ions are called

• Cations
• Electrons
• Anions
• Neutrons

When an atom loses a valence electron, it becomes a(n) _____________ ion.

• positive
• negative
• neutral
• polyatomic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Positive ions form when atoms _________ valence electrons.

• lose
• gain
• share
• gain or share

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many protons are in this element?

• 79
• 196
• 117
• Cannot be determined

Tags

NGSS.MS-PS1-1

What charge does an atom have if it LOSES an electron? 

• Positive (+)
• Negative (-)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2