Question
Which of the following element had a controversial placement in modern periodic table?
Answer: Option C
:
C
Hydrogen can gain one electron and can become H− ion just like halogens (group 17) form X− ion. Also, it can lose an electron and can become H+ ion just like alkali metals (group 1) form M+ ion. Hence, the position of hydrogen was controversial in the modern periodic table although it is considered as a non-metal.
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:
C
Hydrogen can gain one electron and can become H− ion just like halogens (group 17) form X− ion. Also, it can lose an electron and can become H+ ion just like alkali metals (group 1) form M+ ion. Hence, the position of hydrogen was controversial in the modern periodic table although it is considered as a non-metal.
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