The atomic number of an element is 12. based on its electron arrangement, which of the following explains its correct position in the periodic table?
a)group 3, because it has two electrons in the 3p orbital.
b)group 2, because it has two electrons in the 3p orbital.
c)group 3, because its last electron is in the 3p orbital.
d)group 2, because its last electron is in the 2p orbital.
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