Interpretation:
Naming of molecular compounds are needs to be explained.
Concept introduction:
A binary compound comprises of two nonmetal atoms. For naming this compound, first write the name of first element, then second element formula is named by using its root and adding suffix-ide.

Answer to Problem 88A
For writing name of molecular compounds identify the elements. Write the
Explanation of Solution
Prefix in covalent compounds are listed below:
Number of atoms | Prefix | Number of atoms | Prefix |
1 | mono- | 6 | hexa- |
2 | di- | 7 | hepta- |
3 | tri- | 8 | octa- |
4 | tetra- | 9 | nona- |
5 | penta- | 10 | deca- |
Mono- prefix is never used while writing in the first element name.
Consider a molecule
The second element is oxygen and it is named by its root −ox by adding −ide. In this molecule, number of Se is one and O is 2. So, prefix di is used. Hence, the name of the molecule is selenium dioxide.
Ionic compounds have common names in addition to their scientific ones.
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