tell the odd one out and give a reason why it's odd

1.iron,copper,silver,silicon

2.helium,neon,argon,magnesium

3.oxygen,hydrogen,phosphorus,silver

4.copper,iron,lead,mercury,sodium

5.ammonium ion,sulphate ion,chlorine ion,nitrate ion

2
can u tell what u have thinked
thought
mark me as brainliest
No, my answer was better
no i haven't thought

Answers

2015-06-01T16:44:10+05:30
The first one is odd as every other option contains a fluid except of the first choice
2 2 2
thanks
happy
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Welcome
2015-06-01T16:56:58+05:30
5 one because it is ion and all are not
1 2 1
mark as brainliest
Pathetic theory man
Pls mark me as brainliest
Are you mad