Unit 1 Quiz

How many neutrons does a Calcium-48 isotope have?

• 16

• 20

• 28

• 12

How many protons are in this isotope?

• 9

• 21

• 12

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

which atom has  4 neutrons?

• Li-6
• Li-7
• Li-8
• they have the same # of neutrons

Which of the following is the correct isotope for the following ion: Protons = 20; Neutrons = 21; Electrons = 18

• 
• 
• 
• 
• 

How many neutrons are in lithium-7?

• 7
• 6.94
• 3
• 4

What is the atomic # of this atom?

• 1

• 3

• 4

• 7

What is the mass # of this atom?

• 1

• 3

• 4

• 7

What is the mass number defined as?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

What does the atomic number represent?

• the number of protons

• the number of protons and neutrons

• the number of nuetrons

• the weighted average of isotopes