L2.2 Check: Atomic Structure

What is an ion?

• A molecule that has gained or lost one or more electrons
• A type of atom that is neutral
• A particle with no charge
• A type of molecule that has an equal number of protons and neutrons

How are ions made?

• By adding or removing protons from atoms
• By adding or removing electrons from atoms
• By adding or removing neutrons from atoms
• By adding or removing quarks from atoms

Atomic number: ​ (a)  

Mass number: ​ (b)  

Number of protons: ​ (c)  

Number of neutrons: ​ (d)  

Number of electrons: ​ (e)  

• 80
• 200
• 120
• 40
• 60
• 100
• 2
• 1

Element symbol: ​ (a)  

Charge: ​ (b)  

Atomic number: ​ (c)  

Number of neutrons: ​ (d)  

• I
• Xe
• -1
• +1
• 53
• 54
• 127
• 106
• 74
• 73

Atomic number: ​ (a)  

Mass number: ​ (b)  

Number of protons: ​ (c)  

Number of neutrons: ​ (d)  

Number of electrons: ​ (e)  

• 56
• 137
• 81
• 54
• 58
• 2
• 135
• 79

Element symbol: ​ (a)  

Charge: ​ (b)  

Mass number: ​ (c)  

Number of protons: ​ (d)  

• Cr
• 21
• Sc
• +3
• -3
• +4
• -4
• 52
• 24
• 48

Element symbol: ​ (a)  

Charge: ​ (b)  

Number of protons: ​ (c)  

Number of neutrons: ​ (d)  

• Sr
• Kr
• +2
• -2
• 38
• 36
• 50
• 44

Element symbol: ​ (a)  

Charge: ​ (b)  

Atomic number: ​ (c)  

Mass number: ​ (d)  

• K
• 18
• Ar
• +1
• +2
• -1
• -2
• 19
• 39
• 38

Element symbol: ​ (a)  

Charge: ​ (b)  

Mass number: ​ (c)  

Number of protons: ​ (d)  

• Au
• Br
• Og
• 197
• 39
• neutral
• -1
• +1
• 79
• 118

Atomic number: ​ (a)  

Mass number: ​ (b)  

Number of protons: ​ (c)  

Number of neutrons: ​ (d)  

Number of electrons: ​ (e)  

• 15
• 31
• 16
• 12
• 18
• 30
• 45
• 20
• 32
• 3