EXPLAIN WHY HYDROGEN IS PLACED FIRST IN PERIODIC TABLE❓❓❓
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Answer:
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Explanation:
The hydrogen is placed 1 st in periodic table because it has ns1 electron configuration like the alkali metal
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ANSWER :
Hydrogen is placed in group I of the modern periodic table due to following reasons:-
(1) It shows outer electronic configuration similar to group I elements (i.e.1s1).
(2) It readily looses its electron to form H+ ion which resembles the electropositive character of group I elements.
(3) It shows +1 oxidation state like alkali i.e. group Ielements.
(4) Hydrogen also acts as a strong reducing agent like alkali metals and also forms binary compounds with electronegative elements which resembles the group I elements.
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