Question

when did this happen ​

Answer 1

Answer:

In the periodic table the position of hydrogen is ambiguous but generally it is placed at the top of group 1 above the alkali metals. This is because the electronic configuration of hydrogen is similar to alkali metals. ... However because of its small size the properties of hydrogen do not match with the alkali metals.

Explanation:

Hehe Congratulations on Completing 100 Answers

Answer 2

Answer:

Thank you brother Ya sister...

Explanation:

Thank you so much...

and congratulations for 100 answer...