Firstly, atoms are also composed of protons and neutrons as well as electrons.
Now, to answer your question... Atoms are the smallest you can go while still having it be an element, hence the definition ''<span>the basic unit of a chemical element.'' It is the smallest unit that has the chemical properties of an element. However, atoms still need these charges to be atoms. Without electrons, they'd just be ions. Hope this helps.</span>
Fluorine is much more reactive than chlorine (despite the lower electron affinity) because the energy released in other steps in its reactions more than makes up for the lower amount of energy released as electron affinity.
Molar mass of oxygen is: M(O)=16 g/mol Molar mass of carbon is: M(C)=12 g/mol Molar mass of carbon dioxide is: M(CO2)=M(C)+2*M(O) M(CO2)=12 g/mol+2*16g/mol M(CO2)=44 g/mol
<span>Molar mass(M) is the mass of 1 mole of the substance (grams per mole of a compound).</span>
