Class 9 Chemistry · Chapter 8 · Test 1

Modern Periodic Table

25 MCQs covering the modern periodic table, atomic number, periodicity, periods, groups, arrangement of elements, and similarities in chemical properties.

MCQs

25 questions · 20 min · 25 marks

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Sample questions

The first 5 of 25. Try each one, then tap to see the answer.

Question 1
According to the modern periodic table elements are arranged in order of increasing what?
- AAtomic mass
- BAtomic number
- CMass number
- DNumber of neutrons
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Answer: B
The modern periodic table arranges elements according to increasing atomic number.
Question 2
What is the atomic number of an element equal to?
- ANumber of neutrons
- BNumber of shells
- CNumber of protons
- DNumber of isotopes
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Answer: C
Atomic number is equal to the number of protons in the nucleus.
Question 3
What are the horizontal rows of the periodic table called?
- AGroups
- BPeriods
- CBlocks
- DFamilies
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Answer: B
The horizontal rows of elements are called periods.
Question 4
What are the vertical columns of the periodic table called?
- APeriods
- BRows
- CGroups
- DBlocks
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Answer: C
The vertical columns of elements are called groups.
Question 5
How many periods are present in the modern periodic table?
- A5
- B6
- C7
- D8
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Answer: C
The modern periodic table contains seven periods.

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