Reassessment Requirements for
Elements Test
To view this slide show properly make sure to click “Slide Show”
and then “From Beginning”.
Go through each slide and CAREFULLY read each slide and
THINK about what you are reading.
Take notes of the important information on each page.
The Periodic Table of
Elements
An element is a substance that is made from one
kind of atom only. It cannot be broken down into
simpler substances.
atom
An element
atom
An element
Elements
Elements are PURE
SUBSANCES made of only one
type of atom.
So chemists do not have to
write out the whole name of an
element, they are represented
by symbols of one or two
letters.
*An element symbol only
contains one capital letter!
Classifying Elements on
the Periodic Table
Metals
Properties of Metals
Metals appear to the left of the dark ziz-zag line
on the periodic table. Most metals are solid at
room temperature.
METALS
Properties of Metals
Metals have
luster. This
means they are
shiny
Properties of Metals
Ductile
metals can be
drawn into wire.
Properties of Metals
Malleable
metals can
be hammered
into sheets
Properties of Metals
Metals have a high
melting point. They
are also very dense.
Properties of Metals
Conductors
Metals are
good
conductors of
electricity and
heat
Properties of Metals
A chemical property
of metal is its
reaction with
water and oxygen.
This results in
corrosion and
rust.
Nonmetals
Properties of Nonmetals
Nonmetals occur to the right of the dark zig-zag on
the periodic table. Although Hydrogen is in family 1, it
is also a nonmetal. Many nonmetals are gases at
room temperature.
Properties of Nonmetals
Nonmetals do
not have
luster; they are
dull.
Properties of Nonmetals
Brittle
Nonmetals are
brittle so they
break easily.
This means
nonmetals ARE
NOT ductile or
malleable.
Properties of Nonmetals
Nonmetals
have low
density.
Properties of Nonmetals
They also have a
low melting point.
This is why they
are poor
conductors of
heat and
electricity.
Metalloids
Properties of Metalloids
Metalloids can be found clustered around the dark zigzag line that separates
metals and nonmetals.
Properties of Metalloids
Metalloids
have
properties of
both metals
and
nonmetals.
Properties of Metalloids
Metalloids are solids
that can be
shiny or dull.
Properties of Metalloids
They conduct
electricity and
heat better than
nonmetals but not
as well as metals.
Properties of Metalloids
Silicon for example
has a shiny
metallic luster and
is a medium
conductor BUT it is
brittle and shatters
when you hit it
with a hammer.
PRACTICE!
Read the description of the element and decide if it is a
metal, nonmetal, or metalloid by it’s properties. Click to
check your answer.
Hydrogen – clear, no luster,
gas
Magnesium – shiny luster,
malleable, good conductor
Arsenic – shiny luster, brittle
Carbon – black, dull luster,
brittle
Lead – very dense, shiny luster,
malleable
METAL
NONMETAL
METALLOID
Elements & Compounds
The elements,
alone or in
combinations,
make up our
bodies, our
world, our sun,
and in fact, the
entire universe.
Elements & Compounds
When elements
chemically combine to
make different
substance it is called a
compound.
Compounds are made
of two or more
elements joined.
Compound formulas
are written by
combining the element
symbols together.
A compound is a substance that is made from
more than one element.
atom
A compound made up of
2 different elements
atom
A compound made up of
7 different elements
A compound can be broken down into the
elements that make it up.
An element
A compound made up of 3
different elements
An element
An element
PRACTICE!
On the next slide is a
COMPOUND or ELEMENT practice chart.
Read the information given in a row
and decide whether it is an element or
a compound.
Click to check your answer.
Material
Made up of:
Element or
compound
Water
Hydrogen and Oxygen Compound
Coal
Carbon
Element
Carbon dioxide Carbon and Oxygen
Compound
Oxygen
Oxygen
Element
Chalk
Calcium, Carbon &
Oxygen
Compound
Wax
Carbon & Hydrogen
Compound
Table salt
Sodium & Chlorine
Compound
Helium
Helium
Element
PRACTICE READING COMPOUNDS!
Read the compound formula and see if you can figure out
HOW MANY ELEMENTS are in it and WHICH ELEMENTS they
are. Click to check your answer.
NaHCO₃
NaCl
C₆H₉O₆
4 – sodium,
hydrogen,
2 – sodium, chlorine
carbon,
3oxygen
– carbon,
hydrogen, oxygen
33