Across
- 2. states that the physical and chemical properties of the elements recur in a systematic and predictable way when the elements are arranged in order of increasing atomic number
- 4. name for the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table and considered as most reactive nonmetals
- 9. energy required to remove an electron from a neutral atom of an element
- 11. process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons
- 12. a particle, atom or molecule with a net electrical charge.
- 14. an outer shell electron that can participate in the formation of a chemical bond
- 16. an element that has properties that are intermediate between those of metals and nonmetals
Down
- 1. trends specific patterns that are present in the periodic table that illustrate different aspects of a certain element, including its size and its electronic properties
- 3. defined as one - half the distance between the nuclei of identical atoms that are bonded together
- 5. horizontal rows on the periodic table
- 6. measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound
- 7. formulated the Periodic Law and created a farsighted version of the periodic table of elements
- 8. a negatively charged ion
- 10. energy change that occurs when an electron is acquired by a neutral atom
- 13. vertical columns on the periodic table
- 15. a positively charged ion