Drag each number to the correct location on the equation. Each number can be used more than once, but not all numbers will be used. Balance the equation with the correct coefficients.

2
3
4
5

KClO3→ KCl+. O2

2KClO₃  →  2KCl  +   3O₂

Explanation:

The unbalanced expression is given as:

      KClO₃  →  KCl  +   O₂

The reaction equation above is unbalanced and we need to choose between the numbers 2,3,4 and 5 to finally the correct expression that will obey the law of conservation of mass.

       aKClO₃  →  bKCl  +   cO₂

Let a, b and c be the numbers that will balance the expression;

Conserving K;

         a  = b

Conserving Cl;

          a = b

 Conserving O;

           3a  = 2c

let a = 1, b  = 1  and c  = multiply through by 2;

     a  = 2, b  = 2 and c  = 3

So, the balance expression insert;

                      2KClO₃  →  2KCl  +   3O₂

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.