| A | B |
|---|
| atom | building blocks of matter |
| matter | anything that takes up space and has mass |
| mass | amount of matter in and object |
| elements | made of only one type of atom |
| protons | positively charged particles |
| electrons | negatively charged particles |
| neutrons | neutral particles |
| atomic mass | protons + neutrons |
| atomic number | number of protons in an atom |
| valence | ring around the nucleus of an atom; where the electron is |
| isotope | atoms of the same element that have different numbers of neutrons |
| compound | contains atoms of more than one type of element and are chemically bonded together |
| chemical bond | when two atoms from different elements bond together to make another product |
| covalent bonds | when electrons are shared between two elements |
| ionic bonds | when electrons are lost or gained due to a chemical bond |
| ions | electrically charged atoms |
| metallic bonds | covalent bonds found in metals |
| hydrogen bonds | a bond formed with hydrogen and another element |
| mixture | two or more substances not chemically bonded together |
| solution | a homogeneous mixture |
