Chemistry

2. physical substance in general
4. a stable subatomic particle occurring in all atomic nuclei
5. a group of atoms bonded together
11. the basic unit of a chemical element
12. A chemical bond formed between two ions with opposite charges
14. elating to, measuring, or measured by the quantity of something rather than its quality
16. consisting of parts all of the same kind

1. found in all atoms and acting as the primary carrier of electricity in solids
3. relating to, measuring, or measured by the quality of something rather than its quantity
6. chemical bond that involves the sharing of electron pairs between atoms
7. a part or aspect of something abstract
8. a thing that is composed of two or more separate elements; a mixture
9. a substance made by mixing other substances together
10. mass of an atom of a chemical element expressed in atomic mass units
13. a subatomic particle of about the same mass as a proton
15. unit the empirical formula of any ionic or covalent network