if the product has lesser energy than the reactants it means enthalpy change value is positive.so it is endothermic reaction where the heat is absorbed.so kcl will formation will have positive enthalpy change .
So the atomic number is the same as protons, and electrons and to get neutrons by subtracting number of protons from atomic mass.
Answer:THIS IS NOT THE ANSWER
is this for the chemistry A final 10th grade for connexus (unit7 lesson 2)?
Explanation:
Mg3N2
Mg - 3 times 24.31 g= 72.93 g
N - 2 times 14.01 g= + 28.02 g
Molar Mass= 100.95 g/mol Mg3N2
