Across
- 2. Phase of a lightening bolt
- 7. A family that contains liquids, solids, and gases
- 8. Ion is formed when an atom loses or gains one or more _______
- 9. _______ effect is when light causes electrons to be released from the surface of a metal
- 13. The energy of motion is ________ energy
- 14. Anything that has mass and takes up space
- 16. The first periodic table arranged by Mendeleev was based on the atomic ________
- 17. In a(n) _______ system, mass and energy cannot enter or exit
- 19. Phase change from solid to liquid
- 21. Current periodic table is organized based on the atomic ________ which gives the most information about what kind of element an atom is
Down
- 1. Force of gravity between two objects depend on _____ of the two objects and the distance between them
- 3. A family that is made up of all radioactive elements
- 4. All atoms of the same element has the same number of _________
- 5. __________ electrons determines an element's properties
- 6. The capacity to do work
- 10. Noble gas family contains elements with a full _____ of valence electrons
- 11. Promethium (Pm) is in _________ family
- 12. The last name of a person who devised the plum-pudding model
- 15. The first group on the periodic table is called ______ metal
- 18. The last name of a person who made an early form of the atomic theory
- 20. The element with the atomic number of 33