Answer:
The change in internal energy of the heater is 0 kJ
Explanation:
∆U = Q - W
Q is quantity of heat transferred = 1 kJ
W is work done on the heater = 1 kJ
Change in internal energy (∆U) = 1 - 1 = 0 kJ
it's B Cell wall
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The element is Magnesium
- It has total 12 electrons
it has electronic configuration

or

In valence cell it has 2 electrons and therefore its valency is 2
Answer:
A.................. I think the answer