Question

odd one out 1) helium radon argon boron 2) chlorine bromine iodine oxygen 3) aluminium argon xenon sodium 4) lithium magnesium sodium potassium

Answer 1

Answer:

1) boron

2) oxygen

3) sodium

4) magnesium

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Answer 2

Answer:

1)boron

2)oxygen

3)sodium

4)magnesium

Explanation:

1) Boron is the only element not belonging to Group 18 of the periodic table.

2) oxygen is the only element not belonging to the halides (Group 17)

3) Sodium is very reactive while the others are either non reactive (Argon and Xenon) or comparatively very less reactive (Aluminium)

4)Only magnesium does not belong to the Alkaline Earth Metals (Group 1).

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