Question

an element has a atomic number 13and atomic massof27 how many electrons ;protons;neutrons are present in this atom

Answer 1

atomic number = 13
electron = 13
proton = 13
atomic mass = 27
neutrons = 27-13 = 14

Answer 2

Element with atomic no. 13 is ALUMINIUM (Al).
No. of electrons = No. of protons = Atomic no. = 13
No. of Neutrons = Mass no.-Atomic no. = 27-13 = 14