Nuclear Reaction

When nuclei decay (also called radioactive decay), an element stays the same.

• True

• False

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During radioactive decay, massive amounts of __________ is released.

• energy

• jello

• protons

• neutrons

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NGSS.HS-PS1-8

Negatively charged particles found outside of the nucleus are called

• electron
• protons
• neutrons
• nucleons

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Classify this process.

• Nuclear fission
• Nuclear fusion
• Alpha decay
• Beta decay

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How is carbon-12 different from carbon-14?

• They have a different number of protons 
• They have a different number of electrons
• They have a different number of neutrons
• They are different elements 

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 

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NGSS.HS-PS1-8

Nuclear reactions involve the particles in the ____.

• electrons only
• only neutrons
• nucleus as well as electrons
• half-life

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NGSS.HS-PS1-8

What do carbon-12 and carbon-14 have in common? 

• They have the same number of protons
• They have the same number of neutrons
•  They have the same atomic mass
• They have the same atomic weight

Chemical reactions only occur when

• The sub atomic particles within the nucleus change
• very large amounts of energy are released
• bonds are broken and formed
• an atom changes into a different atom

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2H₂ + O₂ → 2H₂O

This is an example of a chemical reaction because

• new atoms are formed

• types of atoms are unchanged and keep their identity

• there are no new bonds

• huge amounts of energy will be released

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