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Atomic Structure | Chapter 12 | 8th Science - Naming chemical compounds | 8th Science : Chapter 12 : Atomic Structure

Chapter: 8th Science : Chapter 12 : Atomic Structure

Naming chemical compounds

A chemical compound is a substance formed out of more than one element joined together by chemical bond.

Naming chemical compounds

A chemical compound is a substance formed out of more than one element joined together by chemical bond. Such compounds have properties that are unique from that of the elements that formed them. While naming these compounds specific ways are followed. They are given below.

 

1. In naming a compound containing a metal and a non-metal, the name of the metal is written first and the name of the non-metal is written next after adding the suffix-‘ide’ to its name.

Examples:

NaCl - Sodium chloride

Ag Br - Silver bromide

 

2. In naming a compound containing a metal, a non-metal and oxygen, name of the metal is written first and name of the non-metal with oxygen is written next after adding the suffix- ‘ate’ (for more atoms of oxygen) or – ite (for less atoms of oxygen) to its name.

Examples:

Na2 SO4 - Sodium sulphate

Na NO2 - Sodium nitrite

 

3. In naming a compound containing two non-metals only, the prefix mono, di, tri, tetra, penta etc. is written before the name of non- metals.

Examples:

SO2 - Sulphur dioxide

N2O5 - Dinitrogen pentoxide

Activity 4

Write the names of the chemical compounds.



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