1)why do the metal of group 1A, 2A ,3A do not need roman numerals?
2) Why do we need to use Roman Numerals in the names for Transition metals and Group 4A metals?
3)When a non-metal becomes an ion what changes about their names?
4)What elements and groups do not form ions?
Answers: 3
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1)why do the metal of group 1A, 2A ,3A do not need roman numerals?
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