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. Why is hydrogen (H) placed with the elements in Group 1A? A It has a very low atomic mass. B It is a very reactive gas. C It has the same number of valence electrons. D They have the same chemical properties.

Respuesta :

Hydrogen (H) placed with the elements in Group 1A because It has the same number of valence electrons. Option C is correct

Why is hydrogen in group 1?

Hydrogen is the first element in the periodic table.

The number of valence electrons in each orbital is used in grouping the elements into groups.

Hydrogen has just one atom and valence electrons it is therefore grouped as 1A.

Therefore,

Hydrogen (H) placed with the elements in Group 1A because It has the same number of valence electrons.

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