Across
- 1. anything made of atoms and molecules
- 4. bond formed when atoms share pairs of electrons
- 6. neutral groups of two or more atoms
- 9. mendeleev founder of periodic table
- 12. formed through a combination of two opposite charged ions
- 14. a particle with a neutral electric charge so basically 0 electric charge
- 15. a particle with a positive electric charge
Down
- 2. basic unit of matter
- 3. electron the electron that is on the outermost shell of the atom
- 5. bondsubstance formed by the chemical combination of two or more elements
- 7. particle with a negative electric charge
- 8. the center of an atom which contains the protons and neutrons
- 10. atoms of an element that has a # of neutrons different from that of other atoms
- 11. atom that has a positive or negative charge
- 13. table chart that shows an elements symbol , mass , and number