Atoms and Elements

1. the total kinetic energy of a substance's particles
3. the state of matter in which the volume and shape of a substance are fixed
6. a measure of the amount of matter in an object
8. a substance that cannot be separated or broken down into simpler substances by chemical means
10. a measure of how hot (or cold) something is; specifically, a measure of the average kinetic energy of the particles in an object
15. the attractive force holding atoms or ions together to form molecules or compounds, arising from interactions between their valence electrons (outermost electrons) to achieve a more stable, lower-energy state, typically by sharing or transferring electrons
16. the amount of force exerted per unit area of a surface
17. A substance made up of atoms of two or more different elements joined by chemical bonds

2. a form of matter that does not have a definite volume or shape
4. the degree of compactness of a substance
5. the amount of space that an object takes up, or occupies
6. anything that has mass and takes up space
7. a group of atoms that are held together by chemical forces; a molecule is the smallest unit of a compound that keeps all the properties of that compound
9. the change of a substance from one physical state to another
11. a sample of matter, either a single element or a single compound, that has definite chemical and physical properties
12. the smallest unit of an element that maintains the properties of that element
13. a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.
14. the state of matter that has a definite volume but not a definite shape