chemistry compo

4. subatomic particle with no mass and negative electrical charge
5. any species that increases the concentration of OH- in an aqueous solution
7. an ion with a negative charge
9. the number of electrons needed to fill the outermost shell of an atom
12. the resulting substance of a physical or chemical reaction
15. produce salts when reacting with metals; Group 17 of the Periodic Table
17. a lasting attraction between atoms, ions or molecults that enables the formation of chemical compounds
18. any species that increases the concentration of H+ in an aqueous solution
19. an electrically neutral group of two or more atoms held together by chemical bonds
21. a chemical reaction in which heat is absorbed
22. center of a an atom
23. metallic element that has valence electrons in two shells instead of one
26. a structure made of ions
28. substance that is changed in a physical or chemical reaction
29. a baryon considered to be composed of two up quarks and one down quark

1. complete transfer of valence electrons between atoms
2. a baryon considered to be composed of two down quarks and one up quark
3. a chemical element with metal and nonmetal properties
5. compound that contains exactly two different elements
6. a column of elements in the periodic table
8. also known as the lithium family of elements
10. molecular bond; a chemical bond that involves the sharing of electron paris between
11. a group of rare gases that exhibit great stability and extremely low reaction rates
13. the theory that all matter is made up of atoms
14. the loss of electrons during a reaction by a molecule, atom or ion
16. a chemical reaction that releases energy through light or heat
20. an ion with a positive charge
24. a chemical element that mostly lacks the characteristics of a metal
25. a species of atoms which all have the same number of protons in their atomic nuclei
27. a chemical reaction in which the oxidation states (charges) of atoms are changed