Radioactivity Answers

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Which is not a form of ionizing radiation?

ultraviolet light

gamma rays

X-rays

infrared light

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Which is the best predictor of the radioactive nature of an isotope?

the proton-to-electron ratio

the neutron-to-proton ratio

the neutron-to-electron ratio

the electron-to-proton ratio

Which statements are supported by the graph? Check all that apply.

For large atoms, more neutrons than protons are needed to be stable.

Nuclei that have 90 or greater protons are always radioactive.

Atoms must have equal numbers of protons and neutrons to be stable.

Atoms that have less than 10 protons do not need neutrons to be stable.

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