| A | B |
|---|
| atom | smallest part of an element |
| nucleus | core of an atom |
| proton | positively charged particle in the nucleus |
| neutron | non-charged particle in the nucleus |
| electron | negatively charged particle outside the nucleus |
| Law of Attraction | unlike charges attract |
| Law of Repulsion | like charges repel |
| element | pure substance comprised of atoms with the same atomic number |
| Atomic Number | number of protons in an atom |
| Atomic Mass | number of protons plus neutrons in an atom |
| ion | atom with an electric charge |
| bond | force that conbines two or more atoms in a molecule |
| molecule | smallest piece of a compound |
| compound | pure matter made of two or more different atoms |
| covalent | bond formed by electrons being shared between atoms |
| ionic | bond formed by electrons transferring between atoms |
| nuclear force | force that overcomes law of repulsion inside nucleus |
| Periodic Table | List of all elements in increasing order of their atomic number |
| Phases of Matter | plasma, gas, liquid, solid |
| Electron | Carries a single negative charge |
| Proton | Carries a single positive charge |
| Neutron | Carries mass but no charge |
| ATP | Major energy molecule for life |
| Electrical energy | Result of ion interactions in cells |
| One | Mass of a proton |
| Atom | Smallest unit of matter |
| Hydrogen | Most common element |
| Deuterium | Hydrogen with one neutron |
| Orbital | Home to electrons around atoms |
| Carbon | Most basic element of life |
| Tritium | Hydrogen with two neutrons |
| Isotope | Atom that has different number of neutrons |
| Molecule | Two or more bound atoms |
| Solvent | Substance that dissolves things |
| Solute | Substance dissolved in solvents |
| Chloride | Term for a chlorine ion |
| pH | Measure of hydrogen in solution |
| HCl | Hydrochloric acid |
| NaOH | Sodium hydroxide |
| pH 2 | Strong acid |
| pH7 | Neutral substance |
| pH13 | Strong base/ alkalai |
| pH 7.3 | Normal blood pH |
| Carbohydrate | Molecule that contains only H, C, and O |
| Denature | Change the molecular shape |
| Enzyme | Protein catalyst |
