Refer to the periodic table in the data sheet when answering this question - VCE - SSCE Chemistry - Question 1 - 2007 - Paper 1
Question 1
Refer to the periodic table in the data sheet when answering this question.
Identify each of the following elements on the basis of the properties listed in the tabl... show full transcript
Worked Solution & Example Answer:Refer to the periodic table in the data sheet when answering this question - VCE - SSCE Chemistry - Question 1 - 2007 - Paper 1
Step 1
The element which forms an ion with electron configuration of 1s²2s²2p⁶ and a charge of +2.
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Answer
The electron configuration indicates that the element is Magnesium (Mg), which has lost 2 electrons to achieve a +2 charge.
Step 2
The third member of the actinides.
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Answer
The third member of the actinide series is Plutonium (Pu).
Step 3
A period 3 element which forms an ionic oxide that reacts with both acids and bases.
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This is Sodium (Na), which forms Sodium Oxide (Na₂O), a basic oxide that reacts with acids and bases.
Step 4
In the ground state, atoms of this element have electrons in 2 shells and the first ionisation energies are 0.80, 2.43, 3.66 and 25.02 MJ mol⁻¹.
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This refers to Magnesium (Mg), which has two shells and the provided ionisation energies support this identification.
Step 5
An element that is more electronegative than chlorine and its atoms have an outer-shell configuration of 5s²p⁵.
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This element is Iodine (I), which is more electronegative than chlorine and has the outer-shell electron configuration of 5s²p⁵.
Step 6
An element which is more metallic than germanium (Z = 32), has a higher first ionisation energy than bismuth (Z = 83) and atoms with an outer-shell configuration of 5s²p².
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Answer
This element is Tin (Sn), which is more metallic than germanium and has the specified outer-shell configuration.
