Across
- 4. Positively Charged
- 5. the weighted average mass of all the natural isotopes of that element
- 6. gain or lose electrons
- 8. same numbers of protons; different number of neutrons.
- 9. made up of two or more atoms that are bonded together
- 10. what gets dissolved
- 13. Negatively Charged
- 15. made of two hydrogen atoms and one oxygen atom that are held together by covalent bonds
- 17. share electrons
- 20. an atom with a charge
- 21. substance made of two or more different elements bonded together
Down
- 1. substance made of one type of atoms
- 2. shows the location of all electrons in an atom
- 3. sum of the protons and neutrons in the nucleus
- 7. attracted
- 11. No charge
- 12. what does dissolving
- 14. uniform mixture
- 16. polar molecule
- 18. other types of molecules
- 19. Number The number of protons in the nucleus