Across
- 1. one horizontal row on the periodic table
- 8. one vertical column on the periodic table
- 10. an element that is shiny, malleable, conductive, and reactive
- 11. the path that electron take around the nucleus
- 13. an element that is dull, brittle, and unreactive
- 15. the number of protons in the nucleus of an atom
- 17. the central part of the atom
- 20. states that matter can’t be created or destroyed
- 22. an element that has properties of both a metal and a nonmetal
- 23. something that expels more heat than it takes in
- 24. the letter or two letters that stand for an element
- 25. a substance made up of two or more elements
Down
- 2. the chemist who formulated the Periodic Table
- 3. the electron(s) in the outermost shell around the nucleus
- 4. the part of the atom with a positive charge
- 5. the result of a chemical reaction
- 6. a substance made up of more than one atom
- 7. a substance made up of only one kind of atom
- 9. the number of protons and neutrons in an atoms
- 12. a substance that changes during a chemical reaction
- 14. the smallest part of matter
- 16. the part of the atom with a neutral charge
- 18. something that takes in more heat than it expels
- 19. the gases with the full number of valence electrons
- 21. the part of the atom with a negative charge