Physical Science 5

1. positively charged ions
2. occurs between metals
3. negatively charged ions
6. used to represent the ratio of ions in a group of ionically bonded atoms
8. the sharing of three pairs of electrons by two atoms
10. tells the identity and number of atoms of each element in the compound
13. can become stable by either gaining one electron or losing its one valence electron
15. Why do atoms form chemical bonds?
18. Covalent bonds form between these type of elements
19. positively and negatively charged atoms

1. the attraction between two atoms that share valence electrons
4. formed when a metal and nonmetal form an ionic compound
5. determines how atoms bond to other atoms and how many electrons an atom needs to share or transfer in order to be stable
7. exist when a pair of atoms share more than one pair of electrons
9. has a full first energy level
11. an electrostatic attraction between atoms resulting from the sharing or exchanging of valence electrons
12. What chemical bonds store
14. Atoms are most stable when they have this many electrons in their outermost or valence energy level
16. of the same element
17. have significantly different properties than the elements they contain