Radioactive Elements

Which of the following is a way that radiation is NOT helpful?

• Used in medical research
• Treating certain illnesses
• Energy production
• Damages human cells

This is when scientists split the nuclei of atoms with neutrons.

• Nuclear fission
• Nuclear fusion
• Nuclear power
• Nuclear weapon

What is released when nuclei decay?

• Minimal amounts of energy
• Massive amounts of energy
• Massive amounts of cheese
• Massive amounts of energy drinks

What makes an element radioactive?

• When it's nuclei expands
• When it's electrons explode
• When it's nuclei behave
• When it's nuclei decay

When its nuclei decay, why does an element change to a different one?

• It loses neutrons, which changes its atomic number
• It gains protons, which changes its atomic number
• It loses protons, which changes its atomic number
• It gains neutrons, which changes its atomic number

Which of the following is a way that radiation is NOT harmful?

• Used to treat certain illnesses
• Damages cells
• Causes illness
• Causes death

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• Nuclear fusion
• Nuclear action
• Nuclear chain
• Nuclear chain reaction

When nuclei decay, an element stays the same.

• True
• False

An element is radioactive when its nuclei decay, or break down.

• True
• False

When an element loses protons, its __________changes.

• protonic number
• electronic number
• neutronic number
• atomic number