phase 2 registration neet
Concept of actaves was proposed by
1. Mosley
2. Mendeleef
3. Newlands
4. Pettenkofer
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Which of the following is not a triad
1. S, Se, Te
2. Fe, Co, Ni
3. Li, Na, k
4. Na, Mg, Al
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Group of Li, Na, K are called
1. Metals
2. Alkaline earth metals
3. Inactive metals
4. Triad
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Which of the following group of elements are triad
1. Na, Ne, k
2. Cl, Br, I
3. Li, Fe, Ni
4. C, N, O
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