Question

in what respect does hydrogen differ from:a)alkali metals b)halogens

Answer 1

1 reason

Hydrogen have only one shell.
Alkali and halogen have more than one shell.


2 reason

Hydrogen oxide is neutral.
Alkali oxide is base.
Halogen oxide is acidic.

Answer 2

Hydrogen differ from ALKALINE METAL 



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BECAUSE 


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1. Its element form exists as diatomic molecules and appears as gas.




2. Its usual oxidation state is +1, the same as alkaline metals.