21.7 mol Rn =
Rn atoms
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130.68 × 10²³ atoms

Explanation:

Given data:

Number of moles of Rn = 21.7 mol

Number of atoms = ?

Solution:

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.  6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ atoms

21.7 mol × 6.022 × 10²³ atoms / 1mol

130.68 × 10²³ atoms

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

"the periodic table is arranged in order of atomic number."