Day 1 nuclear decay exit ticket

Which force holds protons and neutrons together in the atom nucleus?

• electric force

• gravity

• strong nuclear force

• weak nuclear force

Which best represents nuclear fission?

• F

• G

• H

• J

Which of these diagrams represents the type of nuclear reaction that produces energy in the Sun?

• A

• B

• C

• D

During nuclear fission, a nucleus _________.

• grows

• divides

• shrinks

• combines with another

What is the term for an ongoing series of nuclear reactions?

• fission

• chain reaction

• fusion

• nuclear

When two smaller nuclei come together, it is called ________.

• nuclear fission

• nuclear fusion

• chain reaction

• critical mass

In the Sun, hydrogen atoms fuse together to form _________.

• helium

• mercury

• oxygen

• nitrogen

When does radioactive decay occur?

• When the nucleus of an isotope is unstable
• When the nucleus of an isotope is stable
• When the electrons of an isotope are spinning
• When the electrons of an isotope are shared with another isotope

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

• alpha particle
• electroscope
• beta particle
• gamma ray

An alpha particle is sometimes written as

• ⁴₂He

• ⁰_-1e

• ⁰₊₁ e

• ¹₀n