Answer:
O
Explanation:
The atoms lose energy during a change of state, but can still slide past each other; gas to a liquid.
C. Lowering the temperature
At the lower temperature, particles have less kinetic energy, so they move slower.
The answer to this question would be: 3.125%
Half-life is the time needed for a radioactive molecule to decay half of its mass. In this case, the strontium-89 is already gone past 5 half lives. Then, the percentage of the mass left after 5 half-lives should be:
100%*(1/2^5)= 100%/32=3..125%
When it changes phases energy is needednto break down the bonds so that is can change state from one phase to another.
