An element has its electron configuration as 2,8,2.now answer the following questions. a. what is the atomic number of this element?.
QGP:
(2,8,2) just gives you the arrangement of electrons in orbits.
Total number of electrons = 2+8+2 = 12 electrons
So, in the atom, there would be 12 protons as well.
So, atomic number is Z=12. The element is Magnesium (Mg)
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12 is the atomic number as it is magnesium
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what is the valency of the element
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