Question

what is the difference between hydrogen and halogen​

Answer 1

Hydrogen has one electron in its electron shell, needing one additional electron to fill that shell. The halogens all have seven electrons in their outer electron shells. ... Hydrogen, however, also forms a positive ion by losing its one electron; no halogen does this.

Answer 2

• Hydrogen is the first element of the modern periodic table.It is the lightest element.
• Halgens are five non-metallic elements found in group 17 of the periodic table. They all are coloured elements.

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