| A | B |
|---|
| anything that has mass and takes up space | matter |
| tiny particles that make up elements, or the tiny building blocks of matter | atom |
| a substance made of one type of atom and cannot be broken down by physical or chemical means | element |
| positively charged particle located in the nucleus of an atom | proton |
| particle without an electrical charge that is located in the nucleus of an atom | neutron |
| the center of an atom | nucleus |
| negatively charged particle that moves around the nucleus of an atom | electron |
| the number of protons in an atom | atomic number |
| the combined number of protons and neutrons in an atom | mass number |
| atom of the same element that has a different number of neutrons | isotope |
| contains atoms of more than one type of elements that are chemically bonded together | compound |
| the force that holds the atom in a compound together | chemical bond |
| bond that forms by sharing outer electrons | covalent bond |
| a group of atoms connected by covalent bonds | molecule |
| electrically charged atom whose charge resulted from an atom losing or gaining electrons | ion |
| type of bond with the attractive force between two ions with opposite charge | ionic bonds |
| type of bond where electrons are free to move from one positively charged ion to another | metallic bonds |
| type of bond that can form without the interactions of electrons | hydrogen bonds |
| composed of two of more substances that are not chemically combined | mixture |
| components are not mixed evenly and each component retains its own properties | heterogeneous mixture |
| components are evenly mixed together | homogeneous mixture |
| homogeneous mixture whose components cannot be distinguished | solution |
| a measure of the mass of an object divided by its volume | density |
| amount of matter in an object | mass |
| a push or a pull | force |
| the ability to cause change | energy |
| the state of matter where atoms are arranged in repeating patterns, are tightly packed together, and move very slowly | solid |
| the state of matter where atoms are moving semi-freely, are not packed extremely tightly together, and move at medium speed | liquid |
| the state of matter where atoms are not arranged in any particuar pattern, are not packed together at allm and move incredibly fast | gas |
