Across
- 4. horizontal row
- 5. one of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances
- 9. negatively charged particle
- 10. the number of positive charges or protons in the nucleus of an atom of a given element
- 11. any of the chemically inert gaseous elements of group 8A or 0 of the periodic table: helium, neon, argon, krypton, xenon, and radon.
- 13. the mass of an isotope of an element
- 17. neutrally charged particle
- 18. a member of the actinide series
- 19. groups of elements that have the properties of opacity, ductility, conductivity, and a unique luster
Down
- 1. vertical column
- 2. letter or letters representing an element
- 3. a tabular arrangement of the chemical elements according to atomic number as based on the periodic law
- 6. an element not having the character of a metal, as carbon or nitrogen.
- 7. characteristics of an element
- 8. tending to react
- 12. any element of the lanthanide series Also called rare earth, rare-earth element
- 13. smallest particle of matter
- 14. an element that has both metallic and nonmetallic properties, as arsenic, silicon, or boron
- 15. metal any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium, and francium, whose hydroxides are alkalis.
- 16. positively charged particle