Answer:
2
b= they are grouped differently, but all the atoms are still there.
They both have two electron shells. Period indicates number of shells.
It is potassium 39 definately
<u>Answer:</u>
When the temperature increases, the molecules of the gas gain energy. Therefore, they move faster.
This causes the molecules to hit the walls of the container more frequently and with greater force. Hence the pressure inside the container increases.
