Atomic number.
The atomic number is what defines the element.
Explanation:
Let us assume that the value of
= 
Also at 1500 K,
= 

Relation between
and
is as follows.

Putting the given values into the above formula as follows.



Also, 
or, 
= 
= 
Thus, we can conclude that the value of
is
.
Answer: it honestly depends.
Explanation:
Answer:
The lattice energy of MgS is 4 times larger than that of NaCl
Explanation:
because, MgS has a higher charge that is Mg2+,S2− M g 2 + , S 2 − than NaCl (Na+,Cl−) ( N a + , C l − ) .