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Why is hydrogen s placed in the first group of the modern periodic table

Why is hydrogen s placed in the first group of the modern periodic table

Grade:12th pass

2 Answers

shaik hussainbee
18 Points
8 years ago
hydrogen is placed in first group because of its elctronic coniguration is ns1.that’s why it is placed in first place in modern periodic table because moder periodic table is designed depend upon the atomic number.
AYESHA
62 Points
8 years ago
The atomic number of H is 1.And the orbit is ns1.According to modern periodic table H  least number means 1.So it is at the first.Actually there is no clarity for H where we have to place in 7th period or 1st period.For now it took place in 1st period.
 

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