The formula of carbonate of a metal $\mathrm{M}$ is ${\mathrm{M}}_2{\mathrm{CO}}_3$. What will be the formula of its phosphate? 

 

The atom of an element $\mathrm{X}$ contains 17 protons, 17 electrons and 18 neutrons whereas the atom of an element $\mathrm{Y}$ contains 11 protons, 11 electrons and 12 neutrons. 

What type of ion will be formed by an atom of element $\mathrm{X}$? Write the symbol of ion formed. 

The atom of an element $\mathrm{X}$ contains 17 protons, 17 electrons and 18 neutrons whereas the atom of an element $\mathrm{Y}$ contains 11 protons, 11 electrons and 12 neutrons. 

What will be the number of (i) protons (ii) electrons and (iii) neutrons, in the ion formed from $\mathrm{X}$?

The atom of an element $\mathrm{X}$ contains 17 protons, 17 electrons, and 18 neutrons whereas the atom of an element $\mathrm{Y}$ contains 11 protons, 11 electrons, and 12 neutrons. 

What type of the ion will be formed by an atom of element $\mathrm{Y}$? Write the symbol of the ion formed. 

The atom of an element $\mathrm{X}$ contains 17 protons, 17 electrons and 18 neutrons whereas the atom of an element $\mathrm{Y}$ contains 11 protons, 11 electrons and 12 neutrons. 

What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from $\mathrm{Y}$? 

The atom of an element  $\mathrm{X}$ contains 17 protons, 17 electrons, and 18 neutrons whereas the atom of an element $\mathrm{Y}$ contains 11 protons, 11 electrons, and 12 neutrons.

 What is the atomic mass of (i) $\mathrm{X}$ and (ii)$\mathrm{Y}$ ?

The atom of an element $\mathrm{X}$ contains 17 protons, 17 electrons, and 18 neutrons whereas the atom of an element $\mathrm{Y}$ contains 11 protons, 11 electrons, and 12 neutrons. 

What could the elements $\mathrm{X}$ and $\mathrm{Y}$ be?