How many particles would be in 0.5 moles?

3.011 × 10²³ particles

Explanation:

Given data:

Number of moles = 0.5 mol

Number of particles = ?

Solution:

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.

one mole of substance =  6.022 × 10²³ particles

For 0.5 mole of substance:

0.5 mol × 6.022 × 10²³ particles / 1 mol

3.011 × 10²³ particles

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.