Question

1. Tell the number of atoms of each element in these compounds. (1pt per blank) N2O3 _____atoms of Nitrogen ______ atoms of Oxygen CaCO3 _____atoms of Calcium _____atoms of Carbon _____atoms of Oxygen

Answer 1

Answer:-
`N_2O_3` has 2 atoms of nitrogen and 3 atoms of oxygen.
`CaCO_3` has 1 atom of calcium, 1 atom of carbon and 3 atoms of oxygen.

Explanations:- The numbers written as subscripts for the elements in formulas of the compounds represents the number of atoms of that particular element.

The first compound is
`N_2O_3` and in this the subscript of N is 2 and that of O is 3. It means it has 2 atoms of N and 3 atoms of O.

Second compound is
`CaCO_3` and in this the subscript of Ca is not shown it means it is 1, similarly the subscript of C is 1 and subscript of O is 3. So, the compound has 1 atom of Ca, 1 atom of C and 3 atoms of O.