Class 9 Chemistry · Chapter 8 · Test 8
Applying Periodic Trends
24 MCQs covering the use of periodic trends to identify unknown elements and predict their properties using atomic radius, ionization energy, electron affinity, electronegativity, metallic character, reactivity, group properties, period, and electronic configuration.
24 questions · 20 min · 24 marks
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Sample questions
The first 5 of 24. Try each one, then tap to see the answer.
Question 1
An unknown element has one electron in its outermost shell. Which group is it most likely to belong to?
- AGroup 1
- BGroup 2
- CGroup 16
- DGroup 17
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Answer: A
An element with one outermost electron is generally associated with group 1.
Question 2
An unknown element has two electrons in its outermost s subshell. Which group is it most likely to belong to?
- AGroup 1
- BGroup 2
- CGroup 17
- DGroup 18
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Answer: B
An outermost s2 configuration is characteristic of group 2 elements.
Question 3
An unknown element has an outermost configuration of s2p5. Which group does it belong to?
- AGroup 1
- BGroup 2
- CGroup 16
- DGroup 17
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Answer: D
The s2p5 configuration has seven outermost electrons and corresponds to group 17.
Question 4
An unknown element has an outermost configuration of s2p4. Which group does it belong to?
- AGroup 1
- BGroup 2
- CGroup 16
- DGroup 17
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Answer: C
The s2p4 configuration has six outermost electrons and corresponds to group 16.
Question 5
An element has the electronic configuration 2 8 1. Which period does it belong to?
- APeriod 1
- BPeriod 2
- CPeriod 3
- DPeriod 4
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Answer: C
The configuration 2 8 1 has electrons in three occupied shells so the element is in period 3.
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