[Dodoerabe]

Atomic Number - pretty much the number of the element on the periodic table, the atomic number also corresponds to the number of protons (and electrons if the atom is neutrally charged) that the element has. That being said, no two different elements have the same atomic number.
Isotope - a nucleus of an atom contains a number of protons and neutrons. An isotope is when two atoms for the same element (same number of protons) have different number of neutrons. For example the C atom has isotopes of 12 and 14 neutrons. They have the same number of protons, only the neutrons are different.
Hydrogen Bonds - usually found in water molecules, this is a bond caused by a difference in charges within a molecule (involving the H atom). For example let's observe the H2O molecule. Since the O is more electronegative than the H atom, electrons are pulled more strongly to it, giving it a slightly more negative charge while H gains a slight positive charge. Thus in solution, O atoms from one water molecule can form a sort of bond between H atoms in another molecule. Bear in mind that hydrogen bonds can form between H and other strongly electronegative atoms (F, N, etc.)
Properties of Water due to Hydrogen bonding (cohesion, adhesion, specific heat, etc) -
Cohesion in water molecules is assisted due to the hydrogen bonding between them, which helps to explain why they stick together.
Adhesion is how water molecules stick to other materials, like how water droplets stick on surfaces.
The specific heat of water is relatively high for its molecular weight, this is due to the strong attraction that water molecules have with one another. Because they have hydrogen bonds, it would take more energy (greater specific heat) than normal to separate the molecules and cause them to move (more movement = higher temperature)
Also there's surface tension. It kinda goes together with cohesion, in that the hydrogen bonding between water molecules cause them to clump up and adopt a shape that has the smallest area (circular/spherical)
Hydrophobic - a molecule that cannot interact or dissolve in water, due to factors such as being nonpolar (a nonpolar object cannot dissolve in water, a polar solvent) Hydrophobic molecules tend to aggregate together when placed in water.
Valence Electrons in Carbon - carbon has 4 valence electrons, which makes it capable of forming a variety of bonds. It can form a maximum of 4 bonds with atoms, allowing it to form combinations of bonds with various elements.
Enantiomers - I think enantiomers are two molecules that have the same formula and structure, but they are mirror images of each other. I had a book that said imagine "an ant in a mirror" (kinda sounds like it I guess) to help remember :P

All the Functional Groups (CLPN)
-Carbohydrates
-Lipids
-Proteins
-Nucleic Acids

amirite?

Those are macromolecules if I remember correctly. But yeah those are the 4 types of macromolecules.

Functional groups are (in organic chemistry) certain combinations of atoms in a molecule that give it unique properties, i.e an -OH group is an alcohol group, -NH3 is a amine group, etc.

And yes feel free to post some of your questions.