Across
- 2. / horizontal rows in the periodic table
- 5. / substance that is made with one atom
- 7. / substance that is made with 2 or more elements chemically bonded together
- 10. exclusion Principle / orbitals have only 2 electrons that have opposite spins
- 11. mixture / mixture that can see the elements
- 13. / smallest part of an element
- 14. / nonmetallic element on group 17
- 17. / vertical columns in the periodic table
- 18. number / integer that equals to the number of protons and neutrons
- 19. electron / outer shell electron that can be used for transferring or sharing with another atom
- 21. Principle / electrons fills up from the lowest orbital
Down
- 1. / element that can conduct electricity and heat
- 2. / positive charged particle
- 3. / elements that doesn't have any properties of a metal
- 4. mixture / mixture that cannot be separated by elements
- 6. configuration / The arrangement of electrons in an atom
- 8. rule / every orbital in a sub-shell is singly occupied with one electron before any one orbital is doubly occupied
- 9. / elements that have properties of both metals and nonmetals
- 12. mass / average mass of the atoms in the nucleus
- 15. earth metals / element that is on group 2 on the periodic table
- 16. / contains both protons and neutrons
- 20. gases / element on group 18 that have a very low reactivity