neet ug 2021 result
Who proposed periodic law which is the basis of modern system of classification of elements
1. Mendeleef
2. Lother Meyar
3. (1) and (2)
4. None
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Mn does not resemble
1. Cl
2. P
3. S
4. Cr
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Newlands concept actaves failed when carried further to include
1. Lower elements
2. Higher elements
3. Gasious elements
4. None
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Li, Be, B, C, N, O, F, Na, In this arrangement which elements have similar properties according to Newlands concept
1. Li, F
2. Be, Na
3. Li, Na
4. C, N
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