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Question : 3
Total: 9
Write the name, symbol and electronic configuration of an element X whose atomic number is 11.
OR
Can the following groups of elements be classified as Dobereiner's triad:
(a)Na , Si , Cl
(b)Be , Mg , Ca
Atomic mass of Be-9, Na-23, Mg-24, Si-28, Cl35 , Ca − 40 . Justify your answer in each case.
OR
Can the following groups of elements be classified as Dobereiner's triad:
(a)
(b)
Atomic mass of Be-9, Na-23, Mg-24, Si-28, Cl
Solution:
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