Across
- 4. : The regional space around the nucleus of an atom
- 5. : Has a positive charge
- 7. : The ingredients present before a reaction
- 9. : The center of an atom
- 12. : Has a negative charge
- 15. : A substance made from the mixture of two or more atoms
- 16. : The outermost shell of an electron determines the atom's chemical properties
- 19. : A reaction where heat is created
- 21. : The average weight or mass of a element
- 22. : A reaction where when cold is created
- 24. the P.T.) : Rows that go up by electrons highest electricity level
Down
- 1. : Has no electric charge
- 2. the P.T.) : Columns of elements that have same chemical properties
- 3. : The ingredients produced after a reaction
- 6. : After a reaction mass cannot be created or destroyed
- 8. : A Russian chemist that came up with the periodic table
- 10. : Are good conductor of electricity and are usually shiny
- 11. : Two or more atoms chemically bonded
- 12. : A substance that is made from atoms with the same number of protons
- 13. : Element abbreviation
- 14. : A group of rare element gases
- 17. : The number of protons in the nucleus
- 18. : Bad conductor of electricity and a dull appearance
- 20. : Has both characteristics of a metal and non-metal
- 23. : A form of matter that cannot be broken down by any chemical means