Across
- 2. shows the number of each atom in a substance
- 3. has a negative charge
- 6. mass of one mole of substance
- 8. contains both protons and neutrons
- 9. group of atoms that have a charge
- 10. hydrogen atom with two protons
- 12. negative ion
- 14. element with 4 valence electrons and central to life
- 15. amount of substance
- 17. negative charged subatomic particle
- 18. positive ion
- 24. subatomic particle with no charge
- 25. electrons are gained and lost
- 26. hydrogen atom with no neutron
- 28. amount of substance in an substance
- 29. the repeating of the periodic table
- 30. abbreviation of an elements name
Down
- 1. number of atoms in one mole
- 4. group 17 on the periodic table
- 5. the ability to attract electrons
- 7. charged atom
- 11. electrons are shared
- 13. the number of protons in an atom
- 16. outermost electron
- 19. the column on the periodic table
- 20. atoms of same element with different number of nuetrons
- 21. hydrogen atom with a one neutron
- 22. the area an object occupies
- 23. period
- 27. has a positive charge