Trends in the periodic table -5.2

2 Tfends in the Feriodie Yab3e [1 mark]

outcomes
To describe trends in periods and groups in the Periodic Table
To explain how the Periodic Table was deveioped

Neon is in Group 8 of the PeriodicTable. Argon is below neon in the group.
Which of these statements is true? Tick one statement.

l-l ru"on is more reactive than argon.
l-l ru"on is less reactive than argon.

l-l x"on is an inert gas.
I-l ru"on is a solid.

le The diagram shows the outline of the PeriodicTable.

ffi Shade a group of non-metals blue. [1 mark]
ffi Shade the Group 2 metals green. [1 mark]
ffiY{y Draw a red box round the Period 2 elements. [1 mark]
ffi Which of the three elements indicated X, Y andZ have atoms with one
[1 mark]
electron in their outer shells?
[1 mark]
ffi Which of the three elements have atoms with the most electron shells?
59

ffi complete the sentences using words from this list. I
I
faster slower carbon dioxide oxygen hydrogen above below next to
{

When lithium reacts with water, gas is formed. Sodium is

lithium in their group. The rate of reaction of sodium with

water is than the rate of reaction of lithium and water. [3 marks]

ffi Read the following information about three Group 7 elements.

@) At room temperature:
o bromine is a brown liquid
o iodine is a purple-black solid
r chlorine is a green gas.

Write down in order of increasing atomic number these three Group 7 elements.
Give a reason for your answer.

Going down the 7rou? the mase of the af,ome/moleculee
oo the melting and boiling Voints

aleo . AL room lemVeralure, a

gae has a boiling poinf,than a

liquid, and a eolid hae a melLing

point than a liquid. Therefore, qoing down the groug, the order of the elem ente ie

[4 mark]

Magnesium and calcium are both in Group 2 of the PeriodicTable. Magnesium is
above calcium.When magnesium is added to hydrochloric acid you can see bubbles
of hydrogen gas.

Predict what you will observe when calcium is added to some hydrochloric acid.

60

re Explain why elements in the same group of the PeriodicTable have similar chemical

@ properties..

[2 marks]

This is Mendeleev's PeriodicTable from 1869.

I

Explain why Mendeleev left gaps in his version of the PeriodicTable.

ffi

ffi [2 marksl

re&I
Jamila and yuri are investigating the Periodic Table. They find some data on the internet about
@ a group of non-metals. The data is shown in the table below'

the first row of the table by wrlting in the names. of the elements.
you will need to look at a iopy of t-he
PeriodicTable.iCoomjJpltef.,t,eir [3 marks]

61

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