Give the name of the element present in the following compound: Quick lime - Science

Give the name of the element present in the following compound:

Quick lime

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Chapter 3 Atoms and Molecules
Exercises | Q 5.1 | Page 44

Give the name of the element present in the following compound:

Hydrogen bromide

Define: Atomic number

What do the following denote ?

Molecular compounds are usually formed by the combination between :

An element A forms an oxide A2O5.

What is the valency of element A ?

Correct the following statement:

A molecule of sulphur is monoatomic.

Why are the symbols and formulae of substances important?

Give a reason why –

Helium is considered monoatomic, but hydrogen a diatomic molecule.

Define: Atomicity.