Chem Vocab 1

4. a chemical reaction that absorbs heat, producing products with more potential energy than the reactants
6. a diagram that shows valence electrons as dots around the atomic symbol of the element
9. one of two or more different forms of an element in the same phase
13. the stable valence electron configuration of eight electrons
15. a cell that requires electricity to cause a nonspontaneous chemical reaction to occur
16. a bond formed by the transfer of electrons from one atom to another
17. a phase of matter without definite shape or volume
19. a reaction in which an element replaces a less reactive element in a compound
20. the amount of energy needed to form an activated complex from reactants

1. a change that does not alter the chemical properties of a substance
2. an organic compound containing one or more double or triple covalent bond
3. the positively charged particle in the nucleus of an atom
5. a transmutation caused by bombarding a nucleus with a high-energy particle, such as a neutron or an alpha particle
7. a mixture in which the substances are not uniformly mixed
8. the process of determining the concentration of an unknown solution by a reaction with a solution of known concentration
10. a chemical reaction that releases heat, producing products with less potential energy than the reactants
11. the substance that dissolves the solute
12. a part of a voltaic cell that connects two containers and allows the flow of ions
14. a substance composed of two or more elements that are chemically combined in definite proportions by mass
18. an element that has both metallic and nonmetallic properties