Question

1. Lithium , ________ and potassium constitute a dobereiner’s triad.
2. _______ was the basis of the classifications proposed by dobereiner, Newlands and Mendeleev.
3. The group of elements with three elements known as ___________.
4. The electronic configuration of Ne is ___________.
5. Newland’s periodic table restricted to __________ elements.

Answer 1

Answer:

1) sodium

2)octaves

3)transiton metals

4) 1s2 2s2 2p6

Answer 2

Explanation:

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