An ion X2+ contains 18 electrons and 20 neutrons. Calculate the atomic number and mass no. of element X. Name the element X.
A sulphur atom contains 16 protons and 16 neutrons. Give its atomic number and atomic mass number.
Atomic number
Mass number
Number of neutrons
Number of protons
Number of electrons
Name of the Atomic species
9
-
10
16
32
Sulphur
2
1
0