In a balanced equation, the number of each type of atom on the reactant side the number of each type of atom on the product side.

Equal

In balanced equation, the number of each type of atom on reactant side are equal to the number of each type of atom on product side.

Explanation:

Example:

Consider the example of neutralization reaction.

Hydrochloric acid when react with the sodium hydroxide, a salt sodium chloride and water are formed.

Chemical equation:

HCl + NaOH → NaCl + H₂O

When an acid react with base it form the salt and  water. The reaction is also called neutralization reaction because both neutralize each other.

In neutralization reaction equal amount of acid and base react to neutralize each other and equal amount of water and salt are formed. We can see that two hydrogen atoms, one chlorine atom, one oxygen atom and one sodium atom are present on left and also on right side.

iron and sleel

make siroeel

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.