Question

Define Avogadr'os number. Why is it also known as Avogadro's constant?

Answer 1

• The number of units in one mole of any substance is called Avogadro's number or Avogadro's constant.
• It is denoted by ${\mathrm{N}}_{\mathrm{A}}$
• It is equal to $6.022\times {10}^{23}$
• The units may be electrons, ions, atoms, or molecules depending on the character of the reaction and the nature of the substance.
• The number is also called Avogadro's constant because its value is fixed ($6.022\times {10}^{23}$irrespective of the nature of the particles