Question

Pick the odd one out. Give scientific reasons.

1) Carbon, chalk, sodium, gold

2) Hydrogen, mercury, nitrogen, chlorine

3) Helium, neon, chlorine, argon

4) Gold, silver, copper, zine

5) H2, Br2, 03, 02​

Answer 1

Explanation:

1) Chalk- it's a compound all other are elements

2)Mercury- Because it is a metal all others are non metals

3) Chlorine- Others are Noble gases

4)Zinc- They are higher in reactivity series and lies above hydrogen

5) O3/Ozone- All are diatomic, O3 is triatomic.

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Answer 2

Answer:

1) gold

2)mercury

3)helium

4)zine

5)o3