Term | Definition |
Compound | substance containing two or more elements that are chemically combined in a fixed ratio. |
matter | anything that occupies space and has mass |
element | pure substance that can't be broken down into other substances by chemical means |
nitrogen, hydrogen, oxygen, carbon | What are the 4 main elements of life? |
What is an isotope? | an element with the same number of protons, but a different number of neutrons |
molecule | Two or more atoms held together by covalent bonds |
ionic bonds | The bond where electrons are transferred |
covalent bond | The bond where electrons are shared. |
Polar molecule | A molecule that has opposite electric charges on opposite ends |
cohesion | The tendency of molecules of the same kind to stick to one another. |
adhesion | The attraction between unlike molecules |
Acid | A solution with more H+ ions |
Base | A solution with more OH- ions |
valence electrons | Electrons involved in bonding (at the outermost shell) |
hydrophilic | Attracting water molecules |
functional group | A group of atoms within a molecule that interacts in predictable ways with other molecules. |
dehydration | Polymers are formed through a dehydration reaction. |
Hydrolysis | Polymers are broken down through a hydrolysis reaction |