This particle determines what element you have - the elements identity.

• electron
• proton
• neutron
• valence shell

Which particles make up the nucleus of an atom?

• protons and neutrons
• electrons and protons
• electrons, protons, and neutrons
• electrons and neutrons

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

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

• Protons, electrons

• Protons, neutrons

• Electrons, neutrons

• Neutrons, protons

A radioactive nuclide has a ____ stable nucleus than a non-radioactive nucleus of the same element.

• more

• less

• identical

• small

What makes something radioactive?

• elements with an atomic number above 81
• an unstable nucleus
• contaminated sewage
• It decays over time

_______________ is the process by which unstable atoms emit radiation until they become stable.

• Radiation
• Chemical Reaction
• Radioactive Decay
• Isotopes

In order of most to least penetrating radiation we have

• Alpha , Beta,  Gamma
• Beta , Gamma , Alpha
• Gamma, Beta, Alpha
• Gamma, Alpha, Beta

Negatively charged particles emitted from a nucleus at a high speed are ____ .

• protons
• neutrons
• electrons
• protons and neutrons