Question

State the number of protons neutrons electrons and neutrons A) (At No =4 Mass no =9) B) (At No =11 Mass no =23) C) (At No =15 Mass no =31) D) (At No =18 Mass no =40) please help me to solve out this problem........

Answer 1

electrons and protons of any element is equal to its atomic number and no. Of neutrons is = mass no - atomic no