Across
- 3. 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
- 6. 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
- 10. process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons
- 11. vertical columns on the periodic table
- 12. name for the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table and considered as most reactive nonmetals
- 16. an element that has properties that are intermediate between those of metals and nonmetals
- 17. measure of the ability of an atom in a chemical compound to attract electrons from another atom in the compound
- 18. energy required to remove an electron from a neutral atom of an element
Down
- 1. formulated the Periodic Law and created a farsighted version of the periodic table of elements
- 2. horizontal rows on the periodic table
- 4. a substance that contains atoms of two or more different elements, and these atoms are chemically joined together
- 5. energy change that occurs when an electron is acquired by a neutral atom
- 7. a positively charged ion
- 8. an outer shell electron that can participate in the formation of a chemical bond
- 9. a negatively charged ion
- 13. a pure substance that cannot be further broken down by any chemical reaction
- 14. defined as one - half the distance between the nuclei of identical atoms that are bonded together
- 15. a particle, atom or molecule with a net electrical charge.