Which has greater number of atoms a gram of helium or a gram of neon?

Answer 1

Neon is larger because it has more protons, electrons, and neutrons. Look at the element's Atomic Mass for an idea of its size.

Answer 2

Helium will have more atoms.

4 g of He will have 6 x 1023 atoms. So, 1 g of He will have 1.25 x 1023 atoms

20 g of Ne will have 6 x 1023 atoms. So 1 g of Ne will have 0.3 x 1023 atoms

Answer 3

Think about it this way- an atom of helium weighs much less than a neon atom.

Just like a feather weighs much less than a marble. So, are there more feathers in a gram or marbles?

Since Helium weighs much less, there would be more helium atoms in a gram.

Answer 4

A gram of helium has more atoms than a gram of neon because helium is lighter than neon. Helium has a molar mass of 4 g/mol, and neon has a molar mass of 20.2 g/mol, so a gram of helium has more moles and therefore more atoms than a gram of neon.

Answer 5

A gram of helium, since helium has a lower molar mass, it has more molecules per mass unit.

Answer 6

Helium, because the atomic weight is smaller.