Chemical Bonding

7. Made up or consisting of two or more existing parts or elements.
10. A chemical bond between two atoms involving six bonding electrons instead of the usual two in a covalent single bond.
12. A subatomic particle with a negative charge.
14. A type of covalent bond between two atoms in which electrons are shared unequally.
16. Any substance that cannot be decomposed into simpler substances by ordinary chemical processes.
17. A formula where it identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element.
18. A chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell.
19. A covalent bond between two atoms involving four bonding electrons as opposed to two in a single bond.
20. An element that readily forms positive ions (cations) and has metallic bonds.

1. The mass of an atom of a chemical element expressed in atomic mass units.
2. A chemical element that mostly lacks the characteristics of a metal.
3. A force of attraction that holds atoms or ions together in a molecule or crystal.
4. A Chemical element with the symbol O
5. A chemical bond is a lasting attraction between atoms ions or molecules that enables the formation of chemical compounds.
6. An atom or group of atoms carrying a negative electric charge.
8. A positively charged ion.
9. A process in which a chemical substance changes because of the addition of oxygen.
11. Is an outer shell electron that is associated with an atom.
13. A substance that is present at the start of a chemical reaction.
15. A structure or diagram that represents the valence electrons of atoms within a molecule.