1.) There was no way to group the elements into smaller groups so i grouped them into two larger groups of metals and nonmetals and in some cases one small group of metalloids.This were they were all alike in the overall categories.The metals were aluminum, lead, zinc, and phosphrus.The non-metals were sulfur, and carbon and the metalliod was silicon.
2.) Four tests were used on each element appearance, electrical conductivity, crush test, and reactivity with acid. Appearance is a physical property as you examine the object you can see it and feel it.Electrical conductivity is a physical property. A chemical property involves a change that occurs. However, when electricity passes through an object or substance, no change occurs.The crush test also is a physical property to test if the element is malleable or brittle being a physical property because its only examining its physical traits.Lastly reactivity with acid. This is defiantly a chemical change showing the a new product formed between the chemical reaction of the element with the acid.
3.)
a. Metalloids share both characteristics of metals and non-metals.
b. Silicon (Si).
c. Boron (B), Silicon (Si), Geranium (Ge), Arsenic (As), Antimony (Sb), Tellurium (Te), and Polonium (Po).
4.)
a. In terms of metallic characteristics of elements as you proceed from the left of the table to the right the elements become less metallic.
b. As you look horizontally for metallic characteristics of elements you spot more metallic elements in the bottom rows.
Enrichment:
One element who has symbol unlike its name is Gold (Au)- Gold is Au because its Latin root is Aurum, which explains the “A” and the “u”.
No comments:
Post a Comment