Lab 2.1 Grouping of Elements

1. The groupings of elements we made were:
Aluminum and lead
Carbon, Silicon, and Tin
Sulfur and phosphorous.

2.Appearance- Physical. It doesn't have to do with anything chemically, it's just how it looks.
   Electrical conductivity- Chemical. Depending on what kind of atoms make up the element decides if it will hold an electric current.
   Crush Test- Chemical. It depends on how tightly the atoms are packed together.
   Reactivity With Acid- Chemical. An element reacting with something is a chemical property because it depends on how the atoms are formed.

3. A. What is unique about metalloids is that they can have properties of both metals and non metals, depending on the conditions.
   B. Silicon. It is shiny, has some electrical conductivity, is brittle and does not react with acid.
   C. Boron- B, Silicon- Si, Germanium- Ge, Arsenic- As, Antimony- Sb, Tellurium- Te, and Polonium- Po.
 
4.From top to bottom, the elements go from shiny to dull.
   From right to left, the elements go from dull to shiny.

Enrichment:
           Silver-Ag comes from the latin word argentum, which means 'white metal' in English.