Question

Will kilogram of hydrogen contain more atoms than kilogram of lead?Explain.

Answer 1

Do u mean 1 Kilogram? Then yes.
See 1 mole of an element(i.e the atomic weight of it in grams) contains \[6.02\times10^{23}\] atoms. So the more the no of moles more is the no of atoms.
I kg H = 1000/2 moles = 500*A molecules=500*2*A atoms
where \[A=6.02\times10^{23}\]
1 kg Pb=1000/82 atoms
Clearly H's is greater