Which arrow represents the change of state described
above?
The diagram shows changes of state between solid,
liquid, and gas. The atoms of a substance lose energy
during a change of state. Before the change, the atoms
are close together but are able to slide past one
another
gas
0
М
ON
solid
liquid

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

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12 is it do you think so