The number of particles in one mole of a substance is: molecular weight
molecular number
Avogadro's weight
Avogadro's number

Avogadro's number

Explanation:

Avogadro number:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

It means 1 mole of any substance contain 6.022 × 10²³ number of representative particles.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

35.45 g Cl⁻ = 1mole =  6.022 × 10²³  Cl⁻ ions

1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen

true

explanation:

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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