Question

Q.1) Which two elements have since been discovered that were left by Mendeleev in his periodic table?

1) silicon,germanium
2) scandium,gallium
3) gallium,cesium
4) germanium,sulphur.

Q.2) Which of the following element would loose an electron easily?

1) Mg
2) Na
3) K
4) Ca

Q.3) Which of the following will be the outermost shell for elements of period 2?

1) k shell
2) L shell
3) M shell
4) N shell

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Answer 1

Answer:

2) scandium,gallium

3) K

2) L shell

Answer 2

1. Scandium and Germanium