Chapter 2, Problem 107RQ

Interpretation Introduction

Interpretation:

The given compounds are to be identified as molecular or ionic, and their names are to be determined.

Concept Information:

A binary compound that is formed by the transfer of electrons between metals and non-metals is called an ionic compound.

If the two elements in a binary compound are non-metals, then it is a molecular compound.

For naming of ionic compounds containing polyatomic ions, the name of the metal (cation) or a polyatomic cation written first, followed by the name of anion, this can be non-metal, and it this is non-metal (anion), change the suffix of non-metal to $-ide$, adding at the end of the anion, that is in case of monatomic ions. The hydroxide ion and cynide ion are the exceptions.

In case of the stock method of naming of compound, the oxidation states of some or all of the elements in a compound are indicated in parentheses by Roman numerals

Rules of naming molecular compounds:

Replace the ending of the second element with “ide”.

While naming molecular compounds prefixes are used to indicate the number of a given element present in the compound like ” mono-” indicates one, “di-” indicates two, “tri-” is three, “tetra-” is four, “penta-” is five, and “hexa-” is six, “hepta-” is seven, “octo-” is eight, “nona-” is nine, and “deca” is ten.

In case there are two vowels in a row that sound the same once the prefix is added, the extra vowel on the end of the prefix is removed. For example, one oxygen would be monooxide, but instead it’s monoxide. The extra o is dropped.

In case of the compound having only one of the first element, prefix can be dropped. For example, CO is carbon monoxide, not monocarbon monoxide.

The more electropositive atom is written first, followed by the more electronegative atom with an appropriate suffix. For example, H₂O (water) can be called dihydrogen monoxide (though it’s not usually).