Across
- 5. the elements that are usually poor conductors of heat and electricity
- 6. a substance that cannot be broken down into a simpler substance by ordinary chemical means.
- 10. a chart that organizes information about all of the known elements according to their atomic number.
- 11. an atom that has gained or lost one or more electrons.
- 12. a negatively charged particle found in the energy level of an atom
- 13. Group 1 metals on the periodic table that contain 1 valence electron and lose their valence electrons the most easily, making them the most reactive metals
- 15. the property of transmitting heat, electricity, or sound
- 17. the total number of protons and neutrons in the nucleus of an atom
- 18. a vertical column of elements in the periodic table
- 19. the center of an atom; made up of protons and neutrons
- 20. a horizontal row of elements in the periodic table
Down
- 1. the number of protons in the nucleus of an atom
- 2. the electrons in the outermost shell, or energy level, of an atom
- 3. the smallest particle that has the properties of an element
- 4. describes how likely an element is to form bonds with other elements.
- 7. a positively charged particle in the nucleus of an atom
- 8. the elements that are good conductors of heat and electricity
- 9. The charge of an atoms nucleus resulting from it's number of protons
- 14. an element that has properties of both a metal and nonmetal
- 16. a neutral particle in the nucleus of an atom