Across
- 2. composed of two or more elements
- 5. different number of neutrons, but chemically react the same
- 8. substance that cannot be broken down
- 10. center of an atom
- 11. atom that has a charge
Down
- 1. two ions transfer one or more electrons
- 2. atoms stuck together; sharing electron(s)
- 3. happens when electrostatic attraction in proton and electromagnetic attraction in atom
- 4. a groupd of atoms bonded together
- 6. negative charge orbits the nucleus
- 7. particle sticking together of the same substance
- 9. particles sticking together of different substances