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chemistry igcse acapprinted 39 · PDF 39
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39
3 and 4
Q3. Which statement about Period 3 of the Periodic Table is correct?
Aluminium is a nonmetal in Group III.
Argon is in Group VIII and has eight electrons in its outer electron shell.
Magnesium is in Group II and has three electrons in its outer electron shell.
Sulfur is a metal in Group VI.
Q4. Atoms of Sodium, Rubidium and Element Q each have one outer shell electron. Some
properties of these elements are shown.
Element
Melting Point in ℃
Boiling Point in ℃
Density
Sodium
98
883
0.97
Rubidium
39
688
1.53
Q
28
672
1.87
What is Q?
Hydrogen
Lithium
Potassium
Caesium
Q5. Which statement about elements in Group VIII of the periodic table are correct?
They all have a full outer shell of electrons.
They all react with Group I elements to form ionic compounds.
They are all diatomic molecules.
They are all liquids at room temperature and pressure.
P4:
Q1. The list shows properties of some elements.