Lab 2.1 Grouping of Elements

1. The two groups that I created at the end of the lab were metals and non metals.
2. Electrical conductivity is a chemical property because it is related to the subatomic particles (electrons) and how they react with one another. Malleability and appearance are physical properties because they are only how the elements look/appear. The way that the elements look, and the chemical make up of them are unrelated. Chemical reactivity is a chemical property. The name is very self explanatory; this determines if and how the elements reacted with the acid, based on their chemical make-up.
3. Elements that are metalloids are unique because they do not have only the properties of either side. They could exhibit come of the properties of a metal, and at the same time exhibit some properties of a non-metal.
3b. Silicon (Si) is a metalloid.
3c. The 7 metalloids are: Silicon (Si), Boron (B), Germanium (Ge), Arsenic (As), Antimony (Sb), & Tellurium (Te).
4. As you look from left to right on the Periodic Table, you see that the elements listed become less metal-like, that is, with the exception of hydrogen (i.e. Metals, Metalloids, Non-Metals, and finally, the Noble Gases). It seems to be that the elements with more valence electrons are less metal-like, and the elements with less valence electrons are more metal-like, or are metals.
4b. There is a less noticeable trend that appears when looking from the top of the Periodic Table to the bottom. Although the metalic characteristics of elements seem to show a trend from left to right, the Table also shows that, of the first 112 elements, there are more and more metals per row as the period number increases. This shows that elements with more electron shells with exhibit more metalic properties than an element with fewer electron shells.

Enrichment. Gold (Au), number 79 on the Periodic Table, is derived from the Latin word "Aurum" which is a direct translation to the English word "gold". (Bentor, Yinon. Chemical Element.com - Gold. Oct. 20, 2011 http://www.chemicalelements.com/elements/au.html.)