Answer: proton =11
Neutron=11
Electron=11
Valence electron=1
Explanation: proton- An element is defined by the number of protons in its nucleus
Neutron- The atomic mass number is the total number of nucleons
Electron- In an atom, the electrons spin around the center, also called the nucleus.
Valence electron- The element has a full innermost electron shell of two electrons and a full shell of eight electrons in the next shell. The third shell, which is the outermost and the valence shell, has only one electron
