Download Elements and Compounds

Date: Friday 28th November 2014
Title: Elements and Compounds
Starter:
Underline with a ruler
Complete the STARTER
SECTION on your worksheet!!
Thursday 27th November 2014
Learning Objectives
Define an atom, an element and a compound
Describe what makes each element
different
Identify atoms present in compounds using
the periodic table
Draw the structure of a number of atoms
L.O. Define an atom, an element and a compound
Element
A substance made up
of 2 or more different
atoms chemically
joined together
Compound
The smallest particle
of an element that
can exist
Atom
A substance made up
of only 1 kind of atom
L.O. Describe what makes each element different
How do you know which element is which?
16
The smallest
number tells you
how many
protons there are
in an element.
8
The
number of
PROTONS
determines
which
element it
is!!
L.O. Describe what makes each element different
Sc
21
Scandium
Task 2
I
53
Iodine
Tell me the elements –
N
7
Nitrogen
Ce
58
Cerium
Use the symbols to
discover the sentence… 53
I
Iodine
16
Sulfur
S
27
8
3
8
Cobalt
Oxygen
Lithium
Oxygen
Co
O
Li
O
L.O. Identify atoms present in compounds using the
periodic table
Task 3
When we write compound as symbols there are 2
rules:
If there are no numbers then there is 1 of that
element
If there are little numbers then there are that
many atoms of that element
NaO2
L.O. Draw the structure of a number of atoms
Last Task!!
Structure of an atom.
PROTONS AND NEUTRONS GO IN THE NUCLEUS!!
Electrons go on the outside!
How do you know how many?
The little number tells you the number of PROTONS and
ELECTRONS
Take the little number away from the big number tells you the
NEUTRONS