(Ch-5) Language of Chemistry

Balanced Chemical Rquation

A chemical equation in which the number of atoms of each element is same on reactance and products side.

Catalyst

A Substance which can increase or decrease the rate of reaction without taking part in the reaction.

Molecular Formula

To represent the number of atoms of elements that make up the compound.

Chemical Equation

To represent a chemical change with the help of symbols and formulae.

Symbol

The short form to represent an element.

Valency

The number of electrons required for atoms of an element to gain, lose or share to attain a stable configuration.

Radical

A radical is an atom or a group of atoms having a charge, i.e., either negative or positive, on it.

• The radicals having positive charge are called cations, e.g., sodium ion, etc.

• The radicals having negative charge are called anions, e.g., chloride ion, etc.

Reactants

During a chemical change, the new substances which participate during a chemical change, are called reactants.

Products

Products are the new substances formed during a chemical change.

Valency

Valency is the number of electrons required for atom of an element to gain,lose or share to attain stable configurations.

Atomicity

Atomicity is the total number of atoms that make up a molecule of an element.

Balanced chemical equation

A balanced chemical equation is one in which the number of atoms for each element is the same on both the reactant and product sides.

Unbalanced chemical equation

An unbalanced chemical equation is a chemical reaction where the number of atoms for each element is not equal on both the reactant and product sides.

Sodium Chloride

Na1Cl1

Hydrogen Chloride

HCl

Sodium Hydroxide

NaOH

Magnesium Chloride

MgCl2

Ammonium Carbonate

(NH4)2CO3

Aluminium Phosphate

AlPO4

Calcium Nitrate

Ca(NO3)2

Silver Chloride

AgCl