Explanation:
The given statement is a basic concept of mole concept in chemistry. It can be explained as follows:

What is mole concept?
Mole concept is a fundamental concept of chemistry that relates the mass of a substance to its chemical amount in moles. It is a convenient way to express the amount of substance in chemistry, especially for very small or very large amounts.

What is Avogadro's number?
Avogadro's number is a fundamental constant that represents the number of particles (molecules, atoms, ions, etc.) in one mole of a substance. It is approximately equal to 6.022 x 10^23 particles per mole.

How to calculate the number of atoms/molecules in a given amount of substance?
The number of atoms/molecules in a given amount of substance can be calculated using the following formula:

Number of particles = (Amount of substance) x Avogadro's number

Why the number of atoms present in 0.5 g atom of nitrogen is same as the atoms in 8g of the oxygen?
Now, let's apply the mole concept to the given statement.

We are given that the amount of nitrogen is 0.5 g and the amount of oxygen is 8 g.

Step 1: Calculate the number of moles of nitrogen and oxygen.

Moles of nitrogen = (Mass of nitrogen) / (Molar mass of nitrogen)
= 0.5 g / 14 g/mol (molar mass of nitrogen)
= 0.0357 mol

Moles of oxygen = (Mass of oxygen) / (Molar mass of oxygen)
= 8 g / 16 g/mol (molar mass of oxygen)
= 0.5 mol

Step 2: Calculate the number of atoms/molecules of nitrogen and oxygen using Avogadro's number.

Number of atoms of nitrogen = (Number of moles of nitrogen) x (Avogadro's number)
= 0.0357 mol x 6.022 x 10^23 particles/mol
= 2.15 x 10^22 particles

Number of atoms of oxygen = (Number of moles of oxygen) x (Avogadro's number)
= 0.5 mol x 6.022 x 10^23 particles/mol
= 3.011 x 10^23 particles

Step 3: Compare the number of atoms/molecules of nitrogen and oxygen.

As we can see, the number of atoms/molecules of nitrogen is much less than the number of atoms/molecules of oxygen. Therefore, the given statement is incorrect.

Conclusion:
In conclusion, the number of atoms present in 0.5 g atom of nitrogen is NOT same as the atoms in 8g of the oxygen. This statement is incorrect and does not follow the basic principles of the mole concept in chemistry.

0.5 g atom of nitrogen means 0.5 moles of nitrogen and 8g oxygen means 8/16 (weight/atomic weight) = 0.5 moles of oxygen atoms... now as both have 0.5 moles so no. of atoms must also be same