Question

is atomicity needed to write a chemical formula, example hydrogen is h2, so dies that mean we use h2 for making an equation cause the valency is 1 for hydrogen

Answer 1

Answer:

Atomicity is the number of atoms in the molecule of an element. Valency depends on the number of valence electrons present in the outermost shell of the atom. So, if you have to write the molecules of the same type of atom, yes, of course you will need it.

Moreover, it may have other uses too.

Answer 2

Answer:

Yes, Atomicity is needed to write a chemical formula.

Explanation:

Let's first understand what is actually Atomicity and chemical formula.

Atomicity:

• Atomicity represents the number of atoms in a molecule of an element.

Chemical formula:

• It is a symbolic representation of molecules in an element or a compound.
• Also known as Molecular formula.

For example:

Hydrogen is diatomic molecule, that is, it's atomicity is 2 and two atoms are present in its molecule.

We know that the symbol of hydrogen is H and the number of atoms are present in its molecule i.e, Atomicity is 2, therefore, we can easily represent it in its chemical formula H₂.

Now, when any element, say oxygen combines with hydrogen in a fixed ratio to form a compound, we get the chemical formula of a compound by criss-cross method.

For an instānce,

• Symbols - H and O

• Valencies and charge - +1 and -2 ( ignore + and - symbols of radicals )

• Exchange of valency - H¹ O² = H₂O (Right interchangeable valency at lower right corner of an element)

Hence, finally we get our chemical formula with the help of valencies of a compound.

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