Answer:
Unit of power is watt
Explanation:
Power = rate of doing work
or
Power, P = W/t
Where
W is work done and t is time
The unit of work done is Joules and that of time is seconds.
Power, P = J/s
We know that, J/s = watts
Hence, the unit of power is watts.
The answer to the question is Eight
The element that has the least is na
I believe it is A because a physical change is something that can be changed back to where a chemical change can not be such as burning something.