Metals and Nonmetals
True or False: Most elements are nonmetals
False
What color is rust?
Brown/Orange
It's a compound made from a metal and a nonmetal.
A + B --> AB
What are (A+B) called?
The reactants
What is the basic chemical equation for combination reations?
A + B --> AB
Which of these elements are metals?
H2SO4 ?
None
Rusting occurs mostly on what kind of material?
Metal: specifically iron and steel
What is a molecular compound?
It's a compound made from a metalloid and a nonmetal
or
A nonmetal with a nonmetal
A + B --> AB
What is the arrow read as? And what is AB
Yields, Products
Most combination reactions are _ and _ combined together.
metals, nonmetals
Which are good conductors of heat and electricity?
Metals, metalloids, or nonmetals.
Metals
What are the two components needed for rusting?
Oxygen and water
Ionic or molecular:
Na2S
Ionic
Can this happen?
A + B --> ABC
No because mass cannot be created or destroyed.
True or False: When reading a binary (two elements) chemical compound. The name of the metal changes and the nonmetal stays the same.
False
How many elements are metalloids?
7:
Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium, Polonium
What are the four different ways to prevent rusting from ocurring?
1. Painting
2. Greasing
3. Galvanizing (sacrificial protection)
4. Covering in plastic
Ionic or molecular?
PO3
Molecular
Most nonmetals are _ at room temperature.
[state of matter]
Gas
The following nonmetals become:
1. Sulfur
2. Oxygen
3. Chlorine
4. Fluorine
1. Sulfide
2. Oxide
3. Chloride
4. Fluoride
An object is able to be stretched into long thin wires, conducts electricity well, and has a high boiling point.
Is this a metal or a nonmetal?
Metal
Rusting is an example of ______. This means a metal creates a layer of oxide when exposed to the right conditions.
Oxidation
Are most combination reactions ionic or molecular?
Ionic
True or False: Atoms are rearranged in a chemical reaction.
True
Finish the chemical equation in words:
1. Li + S -->
2. K + Cl -->
3. Ca + O -->
1. Lithium Sulfide
2. Potassium Chloride
3. Calcium Oxide