Introduction to Nuclear Chemistry

How much of a 100.0g sample of Au - 198 is left after 8.10 days if its half - life is 2.70 days?

• 12.5 g

• 25.0 g

• 50.0 g

• 6.25 g

Colorless, odorless gas that is a naturally occurring decay product of uranium

• asbestos

• radon

• lead

• carbon monoxide

• formaldehyde

Tags

NGSS.MS-PS1-2

finish the equation

²²⁶₈₈Ra --> ____ + ²²⁶₈₈Ra

• ⁴₂He

• ⁰_-1e

• y

Tags

NGSS.HS-PS1-8

The time taken for half of an amount of radioactive atoms to decay.

• Nuclear fusion

• Full-life

• Dead time

• Half-life

Tags

NGSS.HS-PS1-8

What do these symbols represent?

• alpha particle

• beta particle

• neutron

• gamma ray

Tags

NGSS.HS-PS1-8

How many neutrons are in this isotope of Uranium?

• 235

• 92

• 327

• 143

Tags

NGSS.HS-PS1-8

How is nuclear fusion different from nuclear fission?

• In fusion, the product is a larger atomic nucleus.

• Fission produces energy but fusion does not.

• Fusion produces energy but fission does not.

• In fission, the product is a larger atomic nucleus.

Tags

NGSS.HS-PS1-8

What happens when the number of protons in an atom changes? 

• The number of electrons changes too 

• Usually nothing happens, unless the atom is radioactive 

• The atomic nucleus explodes

• It becomes a completely different atom, with different properties 

Tags

NGSS.HS-PS1-8

Has the highest penetrating power.  Can penetrate our body.  Even several cm thick of lead or several meters thick of concrete cannot stop all of it.

• Alpha

• Beta

• Gamma

What is the charge of beta particles?

• 2+

• -1

• 0

• +1

Tags

NGSS.HS-PS1-8