Standards: c. metals
have properties in common, such as electrical and thermal conductivity. Some
metals, such as aluminum (Al), iron (Fe), nickel (Ni), copper (Cu), silver (Ag),
gold (Au), are pure elements while others, such as steel and brass, are composed
of a combination of elemental metals.
1. Separating Mixtures Review
week you learned the difference between soluble
and insoluble mixtures
you mix a solid into a liquid and it dissolves, it is
If it does not
dissolve it is INSOLUBLE.
Which of these
is an example of a soluble solution
baking soda and vinegar sand and water salt and water
Which of these is
an example of an insoluble solution
sugar and water sand and water salt and water
learned how to separate a soluble solid
from a liquid in a solution.
do you get the salt out of the water in a salt water solution?
2. What Are
Many of the
elements on the periodic table are metals. They all have certain
properties in common. Nickel, copper, iron, silver and gold are all
example of metals; they all have common properties.
Are The Properties Of Metals?
Think of chrome hubcaps or
a spoon. They are both shiny metals.
= heat and electricity can travel through
If you heat water on the
stove, the pot becomes very hot. The metal pot conducts
heat, it allows the heat to travel through it.
density = heavy
A bowling ball and a
basketball are about the same size and shape, but the bowling
ball is heavy for its size. It has high density.
melting point = it doesn't melt
You put butter in a pan and
heat it on the stove. The butter melts, but the pan
doesn't. Metals will melt, but only at very high
Malleable = can be hammered into a
Think about clay. You can apply pressure
and change it from a lump to a pancake. Metals can also
change shape by applying pressure... a lot of pressure!
Corrode = rust
A nail or tin can that is
left outside in the rain will begin to rust and wear away.
This is a chemical change.
4. Elements and
You know that many elements on the periodic table are metals, but not
all metals are pure elements. Some
metals are compounds (combination
- an element in made of 1 kind of atom, a
compound is made by combining 2 or more
different kinds of atoms.
5. How Can You
Tell If A Metal Is A Compound?
If you're not sure if something is a pure element or a
compound of elements, you can tell by looking at the
periodic table. If it is
on the periodic table, then it is an element. If it is noton the table,
then it is a compound or
pure elements. Find out which of these are pure elements by using the periodic table