an element X have the electrons in its outermost third Orbit {a} what will be it's atomic number and number of proton in it .
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Solution
Dear student, The number of electrons in its valence shell ( outermost shell) is 'a'. It has 3 shells therefore it's configuration is 2,8,a. Atomic number is (10+a) ,hence protons are also (10+a). Regards,