What is the SI unit used to measure the amount of substance?

SI unit

• “The International System of Units is abbreviated as SI.
• The SI system has seven base units.

SI unit used to measure the amount of substance

• The mole, symbol mol, is the SI unit of the amount of substance.
• "The amount of substance, symbol n, of a system is a measure of the number of specified elementary entities.
• One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions).
• The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant.