No of neutrons=?
Number of protons=???
Number of electrons=12
Name of the element is Magnesium.
Please explain the procedure to find out the blanks left out
If atomic mass equals no. of protons plus no. of neutrons who can chlorine's atomic mass be 35.5?
Which of the following statement is correct about the atom of an element ?
(a) an atom can have only protons and neutrons but no electrons.
(b) an atom can have only electrons and neutrons but no protons
(c) an atom can have only electron and proton but no neutron
(d) an atom must always have a proton, neutron and electron