Periodic Table

1. Reactive elements that fall in group 2A.
2. The ability of a substance to interact chemically with a second substance.
6. A pure substance made up of two or more element that are chemically combined.
7. Observable and measurable characteristics of matter.
10. A substance that is a physical blend of two or more pure substances.
11. Describe how a substance changes or reacts to form a new substance.
13. Another name for a homogeneous mixture.
17. Elements that are in period 6 and are naturally found, but are rare.
20. The columns on the periodic table.
23. Nonreactive nonmetals in group 8A.
24. The most reactive element on the periodic table.
25. A mixture where the properties are evenly distributed.
27. Highly reactive nonmetals that fall in group 7A.
28. The way light interacts with the surface of a mineral or other material, describing its sheen, gloss, or radiance.

1. Elements that fall in group 1A. Highly reactive.
3. A chemical bond that forms between ions with opposite charges, typically a metal and a nonmetal, through an electrostatic attraction.
4. All metals that fall in the group B elements.
5. Vertical columns of elements on the periodic table that share similar chemical and physical properties.
6. A chemical bond formed when two atoms share electrons.
8. The ability of a material to undergo significant plastic deformation, such as being stretched into a wire, before it breaks or ruptures.
9. A principle in chemistry stating that light elements like hydrogen and helium achieve a stable electron configuration by attaining two electrons in their outermost (valence) shell.
12. Another name for the Lanthanides.
14. A chemical principle stating that atoms tend to achieve a stable configuration with eight electrons in their valence shell.
15. an ordered arrangement of the chemical elements into rows ("periods") and columns ("groups").
16. The element that fall in the A group are called the ____.
18. Elements in period 7 that are known for being highly radioactive.
19. A mixture where you can see the components of the mixture.
21. The ability of a material, often a metal, to be shaped or deformed under compressive stress, such as hammering or rolling, without breaking.
22. The rows on the periodic table.
26. A pure substance made of only one type of atom.