Across
- 2. - a table of the chemical elements arranged to display their periodic properties in relation to their atomic numbers
- 4. - a representation of an atom consisting of its chemical symbol with surrounding dots representing its valence electrons
- 5. is an element in group 18 on the periodic table with eight valence electrons that fill the outer energy level. (Helium is an expectation with only two.) With a whole outer energy level, it is inert.
- 7. - an element that is typically dense, solid, ductile, malleable, highly conductive, and chemically reactive, especially in the presence of nonmental elements. Metals are located on the left end of the periodic table
- 12. - the distance from the center of an atom’s nucleus to its outermost energy level
- 13. is an element in Group 17 of the periodic table with seven valence electrons. It easily gains an electron, forming a 1-anion, which makes it highly reactive.
- 18. - any elements in group 3-12 of the periodic table, typically having one or two valence electrons, which it easily loses, resulting in cations with charges of 1+ or 2+
- 19. - any group 13-16 in the periodic table; so named because they contain metals, nonmetals, and metalloids. These groups are often named for the first element in the family
Down
- 1. - the law that states that the properties of the elements vary with their atomic numbers in the regular, repeated pattern
- 3. - an element from either of two rows usually placed below the periodic table; a member of either the lanthanide or actinide series. It typically has two valence electrons.
- 6. - an element in group 1 of the periodic table, having one valence electron that it can easily lose to form a 1+ cation, making it highly reactive; the most reactive of all the metals
- 8. - a row in the periodic table of the elements; also called a series
- 9. - any electron in the outermost energy level of a neutral atom. Unpaired valence electrons are usually involved in chemical bonding.
- 10. - a measure of an element’s ability to attract and hold electrons when bonded to other atoms
- 11. - a column of elements in the periodic table having similar valence electron arraignments, resulting in similar chemical properties; also known as a group
- 14. - an element that typically has four or more valence electrons and does not exhibit the general properties of metals; located on the right side of the periodic table
- 15. metal - an element in Group 2 of the periodic table, having two valence electrons that it tends to lose easily to become a 2+ cation, making it very reactive
- 16. - an element that is characterized between those of metals and nonmetals; located between metals and nonmetals on the periodic table
- 17. - a column of elements in the periodic table having similar valence electron arrangement, resulting in similar chemical properties; also known as a group.