Physical Science

2. anything that has mass and takes up space
4. columns; similar chemical properties and number of Valence electrons (periodic table)
5. a bond involving the share of electrons between two nonmetals
8. tells the number of protons in an atom (atomic______)
11. basic unit of life
12. a type of atom of the same element
13. explains WHY something happens and is supported by evidence
14. charged particles that result when one or more valence electron transfer from one atom to another
15. neutral particle located in the nucleus of an atom
17. positive ion
18. rows; same number of energy levels
21. the breakdown of a metal because of a chemical reaction in the environment
22. a material that is shiny and reflective
23. says WHAT happens in nature, typically a rule or formula

1. an educated guess you can test with an experiment
3. discovered the electron and created the "chocolate chip cookie" model
6. electrons found in the uttermost energy shell of an atom
7. found outside the nucleus; electrons are located here (________ cloud)
9. protons + neutrons; on the periodic table as a decimal (atomic____)
10. matter composed of identical atoms
14. a bond involving the transfer of electrons between a metal and a nonmetal
16. concluded that the atom is mostly empty space and mass is concentrated in the nucleus
19. a material that can be pulled out or drawn into long wires
20. negative ion