What is a group of 6.022 × 10²³ particles known as?

The formula of carbonate of a metal M is M₂CO₃.

(a) What will be the formula of its iodide?

(b) What will be the formula of its nitride?

(c) What will be the formula of its phosphate?

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

(a) What type of ion will be formed by an atom of element X? Write the symbol of ion formed.

(b) What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from X?

(c) What type of ion will be formed by an atom of element Y? Write the symbol of ion formed.

(d) What will be the number of (i) protons (ii) electrons, and (iii) neutrons, in the ion formed from Y?

(e) What is the atomic mas of (i) X, and (ii) Y?

(f) What could the elements X and Y be?

What name is given to the amount of substance containing 6.022 × 10²³ particles (atoms, molecules or ions) of a substance?

What is the numerical value of Avogadro number?