GROUP 1 – ALKALI METALS
INTRODUCTION & DATA
5) The Group 1 elements have low densities for metals. Which Group 1 elements
float on water?
1) Shade in Group 1 on the Periodic
Table shown.
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2) Give the name for Group 1.
6) What is the trend in melting points in Group 1?
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3) Complete the table about the Group 1 elements.
name
symbol
atomic
number
relative
atomic
mass
number of
electrons
in outer
shell
melting
state at
point
room
temperature
(C)
atomic
radius
(pm)
density
(g/dm3)
CHEMICAL PROPERTIES OF THE ELEMENTS
lithium
7
181
123
0.53
7) a) When Group 1 metals react, what happens to the Group 1 metal atoms in
terms of electrons?
sodium
23
98
157
0.97
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potassium
39
63
203
0.86
rubidium
85
39
216
1.53
caesium
133
28
235
1.87
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b) Where do these electrons go? …………………………………………………..
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PHYSICAL PROPERTIES OF THE ELEMENTS
c) What type of compound is formed? …………………………………………….
4) List some physical properties of the Group 1 metals.
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d) Explain why this happens when Group1 metals react in terms of electron
structure.
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01-January-2016
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Chemsheets GCSE 1028
8) a) Complete the table to show how the Group 1 metals react with oxygen, chlorine and water.
Reaction with oxygen
lithium
sodium
potassium
Reaction with chlorine
Reaction with water
Observation
Observation
Observation
Word equation
Word equation
Word equation
Equation
Equation
Equation
Observation
Observation
Observation
Word equation
Word equation
Word equation
Equation
Equation
Equation
Observation
Observation
Observation
Word equation
Word equation
Word equation
Equation
Equation
Equation
b) Describe how caesium reacts with water. ……………………………………………….....…………………………………………………………..………………………………………..….…..
9) a) What happens to the reactivity as you go down the group? ………………………………………………….....……………………………………………………..…………………………….
b) Explain this trend in reactivity. Use these diagrams to help.
X
X
X
X
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X
XX
XX
X
X
XX
X
X
X
X X
X X
X X
X X
X
X
XX
X
XX
XX
lithium (2,1)
sodium (2,8,1)
potassium (2,8,8,1)
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01-January-2016
Chemsheets GCSE 1028