Nuclear physics review

Plutonium-238 undergoes alpha decay. What is its atomic mass afterward?

• 92

• 96

• 234

• 242

Uraniun-238 undergoes alpha decay. What is its atomic mass afterward?

• 92

• 96

• 234

• 242

Americanum-243 undergoes alpha decay. What is its atomic mass afterward?

• 96

• 94

• 239

• 247

The half-life of sodium-27 is 3 minutes. How much of a 200g sample of sodium-27 would be left after 6 minutes?

• 12.5 g

• 25 g

• 50 g

• 100 g

The half-life of sodium-25 is 2 minutes. How much of a 400g sample of sodium-25 would be left after 6 minutes?

• 12.5 g

• 25 g

• 50 g

• 100 g

The half-life of radium-235 is 2 minutes. How much of a 200g sample of radium-235 would be left after 8 minutes?

• 12.5 g

• 25 g

• 50 g

• 100 g

What is the central part of an atom called that houses the positive and neutral sub atomic particles?

• Electron cloud

• Nucleus

• Proton

• Neutron

What is the central part of an atom called?

• Electron cloud

• Nucleus

• Proton

• Neutron

What is the center of an atom called?

• Electron cloud

• Nucleus

• Proton

• Neutron

How many electrons does this atom have?

• 6

• 2

• 4

• 8