which of the following gases will diffuse faster than air under the same conditions:hydrogen, ammonia, oxygen, methane?(H=1,C=12,N=14,density of air=14.4​

i think slash and

that's what i got you can count the number of atoms

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.

c. orbital shape i hope this is correct