How many atoms are there in 18 grams of silver

Number of atoms= atoms

Explanation:

1 mole is the mass of substance which contain

particles of that substance.Its symbol is 'n'.

Here the quantity is called Avogadro number and it is denoted by .

Mass of the substance in grams is called is molar mass.It is denoted by'M'

Moles can be calculated by :

1)

2)

compare 1) and 2) formula, we get

Put the values of w,M and

atoms

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

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