Radioactive Decay and Half Life

In a correctly written symbol what would be located in the "A" position?

• number of neutrons
• atomic number
• number of electrons 
• mass number

In a correctly written symbol what would be located in the "Z" position?

• number of neutrons

• atomic number

• number of electrons

• mass number

When nuclei decay, massive amounts of __________ is released.

• energy
• jello
• protons
• neutrons

Tags

NGSS.HS-PS1-8

What type of decay is being illustrated in following picture? 

• beta decay
• alpha decay 

Tags

NGSS.HS-PS1-8

Which type of radiation is given this symbol?

• Alpha

• Beta

• Gamma

Which type of radiation is given the symbol?

• Alpha

• Beta

• Gamma

A helium nucleus with two protons and two neutrons is called a(n) ____.  

• alpha particle
• electroscope
• beta particle
• gamma ray

Tags

NGSS.HS-PS1-8

This type of radiation has the highest penetrating power. It 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 half-life?

• The amount of time it takes for some of the nuclei in a sample of the isotope to decay

• The amount of time it takes for half the electrons in a sample of the isotope to decay

• The amount of time it takes for half the nuclei in a sample of the isotope to decay

• the amount of time it takes to double the nuclei in a sample of the isotope to decay

The % of the parent isotope remaining after 2 Half Lives.

• 50%

• 25%

• 12.5%

• 6.25%

Tags

NGSS.HS-PS1-8