Which value would be required to estimate the lattice energy for the hypothetical ionic compound mgh2?
a the electron affinity
b the first ionisation energy
c the magnesium-hydrogen bond energy
d the standard enthalpy change of formation of mgh2

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72