Metals are to the left of the zig-zag, nonmetals are to the right, and metalloids lie on/beside the line.
Explanation:
Since mole ratio of O2 : NH3 = 7 : 4,
Volume of NH3 = 50dm³ * 4/7 = 28.57dm³.
If you think of it endothermic is when there is energy needed for the reaction to occur and exothermic is when the reaction releases energy
Explanation:
A metal atom loses electrons and becomes a positive ion.
