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Science · 2022 · 2 marks
CBSE 2022 · Region 3 · Set 1 · Q3
State the criteria used by Mendeleev for creating his Periodic Table. Compare the position of isotopes of elements in the Mendeleev's Periodic Table…
State the criteria used by Mendeleev for creating his Periodic Table. Compare the position of isotopes of elements in the Mendeleev's Periodic Table and in the Modern Periodic Table.
Marking-scheme solution
Atomic mass
Isotopes were discovered after the proposal of Mendeleev's periodic classification. / No position was given to the isotopes in Mendeleev's Periodic table.
While Modern periodic table is based on the atomic number of elements so isotopes are not given any position in Modern periodic table.
Alternative answer,
No position was given to isotopes in Mendleev Periodic Table and Modern Periodic Table.All Periodic Classification of Elements questions2022 question paperPractice Periodic Classification of Elements →
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