Across
- 1. a vertical column of elements in the periodic table
- 3. Jimmy from Nickelodeon or a neutral subatomic particle in the nucleus of an atom
- 10. an element that does not conduct electricity or heat and is usually a gas at room temperature
- 11. electrons that are located in the outermost energy level of an atom.
- 13. he elements thta are good conductors of heat and electricity
- 15. the smallest unit of a compound that has all of the properties of the compound
- 16. A pure substance that is made up of only one kind of atom
- 17. an atom that has gained or lost one or more electrons
- 18. elements that have properties of metals and nonmetals
- 19. a negatively charged subatomic particle found in the energy level of an atom
Down
- 2. The positively charged particle of the nucleus
- 4. describes how likely an element is to form bonds with other elements
- 5. horizontal row of elements in the Periodic table
- 6. any atoms having the same number of protons but a different number of neutrons
- 7. any of the possible energies an electron may have in an atom
- 8. the center of an atom that are made up of protons and neutrons
- 9. states that there is a periodic repetition of chemical and physical properties of the elements when they are arranged by increasing atomic number
- 12. number of protons in the nucleus of an atom
- 13. anything that has mass and volume
- 14. the smallest particle that has the properties of an element