The amount of substance that contains as many specified elementary particles as the number of atoms in 12 g of carbon-12 isotope is known as-

Question

Question

This question was previously asked in

RRB JE 29 May 2019 (Shift 2) CBT 1 Official Paper

Answer 1

The correct answer is option 2

Key Points

The amount of substance that contains as many specified elementary particles as the number of atoms in 12 g of carbon-12 isotope is known as a mole.
A mole is a fundamental unit in chemistry and is used to quantify the amount of substance.
One mole contains exactly Avogadro's number (approximately $6.022 \times 10^{23}$ ) of specified elementary particles, such as atoms, molecules, ions, or electrons.
The concept of the mole allows chemists to count particles by weighing them.

Additional Information

The term "mole" was introduced by the German chemist Wilhelm Ostwald in 1893.
The mole is one of the seven base units in the International System of Units (SI) and is symbolized by "mol".
The use of the mole simplifies the expression of chemical quantities and reactions.
In 2019, the definition of the mole was revised to be based on a fixed numerical value of Avogadro's constant.