Across
- 2. a column in the periodic table of the chemical elements
- 3. radius the internuclear distance between the two hydrogen atoms in an H2 molecule is measured to be 74pm
- 5. an element that has properties that are intermediate between those of metals and nonmetals
- 9. The physical and chemical properties of the elements are periodic functions of their atomic numbers
- 14. elements that have partially filled d orbitals
- 16. Elements in which all the inner shells are complete but outer shell is incomplete
- 18. a horizontal row of the periodic table
- 19. any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table
Down
- 1. Russian chemist and inventor
- 4. any of a class of substances characterized by high electrical and thermal conductivity as well as by malleability, ductility, and high reflectivity of light
- 6. the amount of energy required to remove an electron from an isolated atom or molecule
- 7. any of the six chemical elements that make up Group 1 (Ia) of the periodic table
- 8. a chemical element that lacks the charictoristicts of a metal
- 10. makes bonding between atoms possible.
- 11. a positively charged ion
- 12. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
- 13. a negatively charged ion
- 15. Easily ionized
- 17. a group of rare gases that include helium, neon, argon, krypton, xenon, and usually radon and that exhibit great stability and extremely low reaction rates