History Of Periodic Table
6 Questions
| Attempts: 48
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Dobereiner's triad was based on
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Atomic mass
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Atomic number
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Ions
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Valency
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- 2.
Position of isotope was a problem in
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Mendeleev's
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Newland's
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Dobereiner's
Correct Answer
A. Mendeleev's -
- 3.
The atomic mass of sodium if lithium - mass 7, sodium and potassium mass 39 are triads is
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23
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30
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26
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21
Correct Answer
A. 23 -
- 4.
Merit of mendeleev' periodic table
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Based on atomic mass
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Position of isotopes
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Left gaps for discovery of elements
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Position of hydrogen
Correct Answer
A. Left gaps for discovery of elements -
- 5.
Who proposed the law of octaves?
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Mendeleev
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Newland
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Mosely
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Dobereiner
Correct Answer
A. Newland -
- 6.
Demerit of Newland's classification is
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Only lighter elements could be arranged
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Only heavier elements could be arranged
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Position of isotopes
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Position of hydrogen
Correct Answer
A. Only lighter elements could be arranged -
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Mar 19, 2022Quiz Edited by
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May 05, 2020Quiz Created by
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