Chemistry, 03.02.2021 18:10 Lizzyloves8910

3) What evidence indicates that the nuclei of strontium-90 atoms are unstable?
A)
Strontium-90 electrons are in the excited state.
B)
Strontium-90 electrons are in the ground state.
C)
Strontium-90 atoms spontaneously absorb beta particles.
D)
Strontium-90 atoms spontaneously emit beta particles.

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3) What evidence indicates that the nuclei of strontium-90 atoms are unstable?
A)
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