<u>Answer:</u> All the given options have the same number of particles.
<u>Explanation:</u>
For the given options:
- <u>Option 1:</u> 22.990 g of Na
According to mole concept:
1 mole of an atom contains number of atoms.
If, 22.99 g of sodium metal contains number of atoms.
So, 22.990 g of sodium metal will contain number of atoms.
Number of particles =
- <u>Option 2:</u> 1 mole of Na
According to mole concept:
1 mole of an atom contains number of atoms.
So, 1 mole of sodium element will also contain number of atoms.
Number of particles =
- <u>Option 3:</u> 9.012 g of Be
According to mole concept:
1 mole of an atom contains number of atoms.
If, 9.01 g of beryllium metal contains number of atoms.
So, 9.012 g of beryllium metal will contain number of atoms.
Number of particles =
- <u>Option 4:</u> 1 mole of Be
According to mole concept:
1 mole of an atom contains number of atoms.
So, 1 mole of beryllium element will also contain number of atoms.
Number of particles =
Hence, all the options have same number of particles which is