
Interpretation:
The reason due to which the given compounds cannot be formed needs to be explained.
Concept introduction:
A compound must be neutral that is the total positive charge of the cations should be counterbalanced by the total anionic charge in a compound.

Answer to Problem 7E
Explanation of Solution
Sodium is monovalent and chlorine is also monovalent. Thus, one sodium ion will combine with one chloride ion producing NaCl which is charge neutral. In
Similarly, calcium has two valencies and chlorine has 1 valency. Thus one calcium ion will need two chloride ions to form a neutral compound. Thus, the formula should be
Now, Aluminium has valency 3 and oxygen has valency two. Thus 2
Thus NaCl2, CaCl and AlO do not form.
Chapter U1 Solutions
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