How many protons does lithium have?

• 3

• 4

• 7

What charge does an atom have when it GAINS electrons?

• Positive

• Negative

• Neutral

What is a representation of an ion?

• Li

• Na-22

• O^-2

An ion forms when an atom gains or loses

• Protons
• Neutrons
• Electrons

A neutral atom would become an ion that has a charge of 2+ by 

• Losing two protons
• Losing two neutrons
• Losing two electrons

How many electrons in a neutral lithium atom?

• 3

• 7

• 4

• 1

Tags

NGSS.MS-PS1-1

How many electrons in an oxygen ion (O^-2)?

• 8

• 7

• 10

• 16

Tags

NGSS.HS-PS1-1

How many protons in a neutral aluminum atom?

• 13

• 27

• 16

• 10

Tags

NGSS.MS-PS1-1

A positively charged ion is formed when

• A neutron is lost
• An electron is lost
• A neutron is gained
• An electron is gained

Tags

SPS1a

An ion that has a negative charge is formed when an atom 

• Loses neutrons
• Loses electrons
• Gains neutrons
• Gains electrons

Tags

SPS1a