Radioactivity

An isotope of an element has the same number of _________, but a different number of _________.

• Protons, electrons

• Protons, neutrons

• Electrons, neutrons

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

An alpha particle is made up of

• 2 protons and 4 neutrons

• 1 proton and 1 neutron

• 2 protons and 2 neutrons

• 4 protons and 2 neutrons

Which type of nuclear radiation can be stopped by a sheet of paper?

• Alpha

• Beta

• Gamma

What type of radioactive decay is shown here?

• Alpha decay

• Beta decay

• Gamma decay

When a substance undergoes beta decay

• The atomic number increases by 1

• The atomic number decreases by 2

• The atomic number does not change

Which type(s) of radiation is a fast moving electron?

• alpha

• beta

• gamma

• alpha and beta

• beta and gamma

Which type(s) of radiation can pass through paper?

• alpha

• beta

• gamma

• alpha and beta

• beta and gamma

Look at the diagram of an atom of a common element. What is the atomic number?

• 3

• 4

• 7

• 10

Look at the diagram of an atom of a common element. What is the mass number?

• 3

• 4

• 7

• 10