According to the mole concept, it is much easier to weigh a quantity of atoms than it is to count individual atoms.

Yes, that's correct. The mole concept, introduced by Amedeo Avogadro, is a fundamental concept in chemistry. It provides a bridge between the atom and the macroscopic world. A mole is defined as the amount of any substance that contains as many particles (atoms, molecules, ions, etc.) as there are atoms in exactly 12 grams of carbon-12. This number is known as Avogadro's number, and it is approximately 6.022 x 10^23.

So, instead of counting individual atoms which is practically impossible due to their extremely large number, we can weigh a certain amount of substance and determine the number of moles, and hence the number of atoms, using Avogadro's number. This makes calculations and measurements in chemistry much more feasible.