The Periodic Table
The elements of
Group 1, 7 and 0
TRUE
OR
FALSE
Use your planner to
show ‘true’ or ‘false’
for the following
statements about
Group 1 elements.
Group 1 elements are
metals.
Group 1 elements are
hard.
Group 1 elements become
less reactive down the
group.
Group 1 elements can
conduct heat and electricity.
Group 1 elements react with
water to produce metal
hydroxides and hydrogen.
As discussed last lesson, Group 1 elements are
also known as... Alkali metals
What are Group 7 and Group 0 elements known as?
Which elements are these groups?
Halogen
"salt-former"
Compounds containing
halogens are called
"salts"
Noble gas
They are so majestic!
In general, they don't
react with anything
Extension: Try these MCQs
Attempt to
complete as
much of the
worksheet as
you can using
knowledge from
Year 8
Which of these is a typical property of metals?
A. High melting point
B. Brittle
C. Poor conductor of heat
Suggest the pH of the solution made when
potassium oxide dissolves in water.
A. pH 2
B. pH 7
C. pH 14
Why do lithium, sodium and potassium all have
similar chemical properties?
A. They all have one electron in their outer shell
B. They all have odd numbers of electrons
C. Their outer shell electrons are very far from
the nucleus
Group 7
The Halogens
The colour
of the
elements
get darker
from top to
bottom
Group 7
The Halogens
★ Reactivity decreases as you go down
the group.
★ In larger atoms the outermost
electrons are further from the nucleus.
★ This makes it harder to gain an electron
as it will be less strongly attracted to
the nucleus
R
E
A
C
T
I
V
I
T
Y
D
E
C
R
E
A
S
E
S
F
Cl
Group 0
The Noble Gases
They are
inert
(unreactive)
and do not
form
compounds
Create a poster comparing Group 1, 7 and 0/8.
Your poster should contain the following.
a)The physical properties of the groups
(Boiling point and Melting point)
b) The reactivity as it goes down the Group
c) The trends in the atomic size
d) Special characteristics – colour, the reaction
with…
Compare the patterns in properties of
the Group 1 elements with the patterns
in properties of the Group 7 elements.
4 marks
The best answers will provide a detailed comparison between
patterns in properties of Group 1 and Group 7 elements Examples of
correct scientific points:
● Going down Group 1, the elements become more reactive. For
example, the reactions with water become more vigorous.
● Going down Group 7, the elements become less reaction. For
example, the reactions with iron become less vigorous.
● Melting points decrease going down Group 1.
● On the other hand, melting points increase going down Group 7