Groups 1&2———— 6&7

• Group 1 and 2 elements are metals and they lose electrons to form a positive ions {cations}
• group 6 and 7 elements and non-metals. they gain electrons to form negative ions {anions}
• elements in the same group all have the same number of outer electrons.
• grup 1 elementals form 1+ ions.
• group 2 elements form 2+ ions.
• group 6 elements form 2- ions.
• group 7 elements form 1- ions.