Periodic Table
Across
- 3. a positively charged subatomic particle in the nucleus of an atom
- 5. any atoms having the same number of protons but a different number of neutrons
- 7. Very Cold
- 8. describes how likely an element is to form bonds with other elements
- 12. a vertical column (up and down) on the periodic tab
- 13. nonmetal
- 15. the center of an atom; made up of protons and neutrons
- 16. an ion with a positive charge
- 18. the process of adding electrons to or removing electrons from an atom or group of
- 19. the smallest unit of an element
- 20. the elements that are good conductors of heat and electricity
Down
- 1. a horizontal row (left to right) in the periodic table.
- 2. electrons that are located in the outermost energy level of an
- 4. region in an atom where there is a high probability of finding electrons
- 6. What We Breath
- 9. substance that cannot be broken down into a simpler substance
- 10. an atom that has gained or lost one or more electrons.
- 11. the number of protons and neutrons in the nucleus of one atom
- 14. the number of protons contained in each nucleus of its atoms
- 17. an ion with a negative charge
- 21. symbol for atomic mass unit