Rank the following materials in descending order from most atoms in 1 kg of the material to least atoms in 1 kg of the material (1 for the material with the most, 2 for the material with the second most, etc.):

Aluminum:

Uranium:

Iron:

Hydrogen:

Question

Rank the following materials in descending order from most atoms in 1 kg of the material to least atoms in 1 kg of the material (1 for the material with the most, 2 for the material with the second most, etc.):

Aluminum: 

Uranium: 

Iron: 

Hydrogen:

aaronq · Answer

An element with a larger molar mass will contain less atoms than one with a smaller molar mass. This is analogous to saying "In 1 kg of either fruit which has more units, bananas or watermelons?"