Particles that orbit the nucleus are called electrons.
Explanation: Electrons are negatively charged particles arranged in orbits around the nucleus of an atom and determining all of the atom's physical and chemical properties except mass and radioactivity.
The decreasing order of the mass of the molecules are:
Fe2O3>C6H14>CaCO>NO2
Explanation:
Let us calculate the atomic mass of the molecules given:
C6H14 Atomic mass of 1 carbon atom =12.01 amu
so, 6*12+1*14 Atomic mass of hydrogen=1.007
= 86 g/mol
Atomic mass of NO2
= 14+ (2*15.9)
= 14+ 31.8
= 45.8 g/mol
Atomic mass of Fe203
( 2*55.845)+ (3*15.9)
= 159.69 g/mol
Atomic mass of CaCO
40.07+12.0107+15.99
= 68.07g/mol
The decreasing order of the mass of the molecules are:
Fe2O3>C6H14>CaCO>NO2
The answer to this problem is E