Yes.
No, lighter. Two pounds is 32 ounces.
The answer depends on whether you simply wish to identify the different apple or whether you also want to know whether it is heavier or lighter than the others. The question is, therefore, underspecified.
Individual atoms may be heavier or lighter. Also, the spacing between atoms may vary.
No a gram is 1000 times lighter than a kilogram (kilo is a prefix meaning a thousand). So 4 kilograms is 1000 times heavier than 4 grams.
heavier because they are two different weights
Helium is lighter than air
LIGHTER
Gold is heavier than lead, but lighter than tungsten.
Just, simply, Lighter than Air Vehicles are lighter than air, so that makes them fly, and Heavier than air vehicles are heavier than air, but they use airfoils on the wings to fly.
hydrogen
rhenium
One is lighter and the other one is heavier. :D
Tritium is lighter than deuterium. Tritium is a hydrogen isotope with one proton and two neutrons, making it heavier than regular hydrogen but lighter than deuterium, which has one proton and one neutron.
Nitrous oxide is slightly heavier than air.
Heavier but safer. Look what happened to the Hindenburg:(
No. Neon is lighter than iron