Question

The number of protons in the nucleus of one atom of an element Y is 5. The symbol of ion formed by an atom of this element will be:

(a) $Y^{3-}$

(b) $Y^{2+}$

(c) $Y^{2-}$

(d) $Y^{3+}$

Answer 1

Answer :

(d) $Y^{3+}$
The number of protons is equal to the number of electrons in an atom. Hence, the electronic configuration of element Y is 2,3. Thus, it becomes stabilised by donating its 3 electrons to form $Y^{3+}$.