The positively charged particles in the nucleus pull the negatively charged electrons. When we move from left to right, the number of protons increases then more protons attract negative charges, so electronegativity increases. This happens due to a greater charge on the nucleus which makes electron bonding pairs to be very attracted to atoms located more right on the periodic table. Fluorine is the most electronegative element which is present in seventh group known as halogen group.
Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly of three phases or states of matter are gas, liquid, and solid.
You have to use Avogadro's number which is 6.02x10^23. The units of Avogadro's number is molecules/mole so you divide the number of molecules by Avogadro's number which will give you the number of moles. (2.0x10^22 molecules)/(6.02x10^23 molecules/mole)=0.033 moles
