How many particles (atoms, molecules or ions) are present in one mole of any substance?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 6.022 × 1023
One mole of any substance contains 6.022 × 1023 particles. This number is called the Avogadro number (Avogadro constant), after the Italian scientist Amedeo Avogadro.