The equation

Is in accordance with the law of _______________

Which of the following element form cation?

What is the relative atomic mass of Chlorine ?

Which of the following is a molecule having single atom ?

According to Dalton's atomic theory, atoms ________________________.

What is the symbol of Bromine?

What does a symbol indicate?

(a)  It represents one particular element.

(b)  It represents number of atoms of the element.

(c)  It represents one atomic mass of the element.

During any physical or chemical change, the total mass of products is equal to the total mass of reactant. It is known as ___________________

Identify the correct statement :

(a)  Hydrogen atom is the smallest atom and its radius is 0.1 nm.

(b)  1/10⁹ m equals to  1nm.

(c)  1 nm equals to 10^-9 m.

Arrange the statements in a systematic way of writing the chemical formula for simple compounds:

(a) Write the symbol of cation first followed by the symbol of anion.

(b) Write the symbols of constituent elements and their valencies.

(c) The positive and negative charges must balance each other and the overall structure must be neutral.

(d) Then criss-cross their charges or valencies to get the formula.