WHAT IS THE ELEMENT: of Group 1A, the major oxygen compound of which contains the ion O22– b) of Group 2A, which is abu

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WHAT IS THE ELEMENT:
of Group 1A, the major oxygen compound of which contains the ion O22–
b) of Group 2A, which is abundant in the Earth's crust
c) of Group 3A, with the most important applications
d) of Group 4A, with the most metallic character
e) of Group 5A which forms the strongest π bonds
f) of Group 6A, with the smallest atomic radius
g) of Group 7A, with the highest electronegativity
h) of Group 8A, with the lowest ionization energy (not radioactive)