Across
- 2. When the elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties
- 5. Nonmetals of group 7A
- 6. The energy requires to to overcome the attraction of the nuclear charge and remove an electron from a gaseous atom
- 7. An electron in the highest occupied energy level of an atom
- 8. The horizontal rows of the periodic table
- 11. The tendency for the atoms of the element ti attract electrons when they are chemically combined with atoms of another element
- 13. Elements that are ductile and malleable
- 14. A notation that depicts valence electrons as dots around the atomic symbol of the element
- 17. Appear below the main body of the periodic table and often called the rare-earth elements
- 18. Examples include; copper, silver, gold, and iron
- 19. Group 1A elements
- 20. An arrangement of the elements according to similarities in their properties
Down
- 1. Group 2A elements
- 3. One-half of the distance between nuclei of two like atoms in a diatomic molecule
- 4. Elements that are generally non-lustrous and that are generally poor conductors of electricity
- 9. Group A elements
- 10. Atoms react by gaining or losing electrons in order to obtain the stable electron structure of a noble gas
- 12. The vertical columns of the periodic table
- 15. Elements with properties that are intermediate between those of metals and nonmetals
- 16. Nonmetals of group 0