Atomic number of aluminium is 13 and mass number is 27

cbse
structureofatom

#1

Atomic number of aluminium is 13 and mass number is 27. Calculate the number of electrons, protons and neutrons in its atom. Represent the ion of this element.


#2

Number of electrons = 13
Number of protons =13
Number of neutrons = 27 —13 =14
Its electronic configuration is 2,8, 3(K,L,M)
As it may lose 3 electrons easily to achieve completely filled outermost shell and hence become stable, it acquires a positive charge of +3. Therefore, its ion is represented as $A{{l}^{3+}}$