Across
- 3. , the center of an atom made up of protons and neutrons
- 6. , the elements that are usually poor conductors of heat and electricity
- 14. , Elements in group 8A of the periodic table. Have no charge.
- 15. , the number of protons in the nucleus of an atom
- 16. metallic elements in group 2 of the periodic table
- 17. the basic unit of a chemical element
- 18. a horizontal row of elements in the periodic table
- 19. a vertical column of elements in the periodic table
Down
- 1. , the elements that are good conductors of electrical and thermal
- 2. , a negatively charged subatomic particle found in the energy level of an atom
- 3. a subatomic particle of about the same mass as a proton
- 4. , another name for group
- 5. , the total number of protons and neutrons in the nucleus of an atom
- 7. , another name for metalloids
- 8. He is credited as being the primary creator of the first version of the periodic table of elements.
- 9. , capable of being shaped or bent
- 10. , group 1 or 1A
- 11. ,14 elements with atomic number 58-71 (shiny metals similar in reactivity to to alkaline earth metals)
- 12. , an element that has properties of both a metal and nonmetal
- 13. Elements of group 7A. Have a charge of -1. Fluorine, Chlorine,