Matter

1. number - the total number of protons and neutrons in an atomic nucleus.
3. - an element whose properties are intermediate between those of metals and solid non-metals or semiconductors.
5. - a specialized structure occurring in most cells
7. - a group of two or more atoms that form the smallest identifiable unit into which a pure substance
10. - column in the periodic table of the chemical elements.
13. - anything that has mass and volume
15. - smallest unit into which matter can be divided without the release of electrically charged particles.
17. - the abundance of a constituent divided by the total volume of a mixture.
18. - the spontaneous passage or diffusion of water or other solvents through a semipermeable membrane
19. - process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration
20. earth - metal, any of the six chemical elements that comprise Group 2 of the periodic table.

2. - a notation of one or two letters representing a chemical element.
4. - any substance composed of identical molecules consisting of atoms of two or more chemical elements.
6. - any substance that cannot be decomposed into simpler substances by ordinary chemical processes.
8. - the capacity for doing work.
9. - a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
11. number - the number of a chemical element in the periodic system
12. - an element that readily forms positive ions and has metallic bonds.
14. - metallic substance composed of two or more elements, as either a compound or a solution.
16. table - a tabular display of the chemical elements, which are arranged by atomic number