ions, radicals and valency

Carbon dioxide (CO₂) contains how many atoms of oxygen?

• 0
• 1
• 2
• 3

Tags

NGSS.MS-PS1-1

What are atoms composed of?

• Protons and electrons.

• Protons, neutrons, and electrons.

• Neutrons and electrons.

• Ions, elements, and compounds.

Tags

NGSS.MS-PS1-1

Why are ions formed?

• To make our lives difficult

• Because atoms want to be stable

• Because atoms have the same number of protons and electrons

• Because atoms gained neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which particles change the charge in atoms when ions are formed?

• Protons

• Electrons

• Neutrons

Tags

NGSS.HS-PS1-1

Cations are...

• Positive

• Negative

• Neutral

Anions are...

• Positive

• Negative

• Neutral

Tags

NGSS.HS-PS1-2

An atom becomes _________ when it gains electrons.

• Positive

• Negative

• Neutral

Tags

NGSS.HS-PS1-1

An atom becomes _______ when it loses electrons.

• Positive

• Negative

• Neutral

Cations are _______ that form ____________ ions and __________ electrons.

• nonmetals, positive, lose
• nonmetals, negative, gain
• metals, positive, gain
• metals, positive, lose

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Anions are _______ that form ____________ ions and __________ electrons.

• nonmetals, positive, lose
• nonmetals, negative, gain
• metals, positive, gain
• metals, positive, lose

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2