Avogadro’s Number, also called the mole, is a unit chemists use to measure atoms.
(His full name is Lorenzo Romano Amedeo Carlo Avogadro)
The Mole is 6.0221415 x 1023, Which is approximately Six Hundred and Two Sextillion.
This is used to measure atoms. For example, 6 grams of carbon with have approximately 6.0221415 x 1023 atoms of carbon, the same way, 1 gram of hydrogen will have 1 mole of hydrogen atoms.
If you noticed, the number of grams of the atomic number of an element is 1 Mole.
1 gram of hydrogen (Atomic number 1) = 1 mole of hydrogen atoms
2 grams of helium (Atomic number 2) = 1 mole of helium atoms
3 grams of lithium (Atomic number 3) = 1 mole of lithium atoms
And so on…
Watch the Ted-Ed Video below to learn more about Avogadro’s Number: