Write down the atomic number, atomic mass, the number of protons and neutrons

Write down the atomic number, atomic mass, the number of protons and neutrons in the nucleus, the electronic structure of selenium atoms.

Selenium, chemical formula – Se. It is a chemical element of group 16, 4 periods of the D.I. Mendeleev. Black metal, refers to chalcogenes. It has an atomic number 34, since its ordinal number in the system is 34. The atomic mass of an element, we find out by looking also in the table. The atomic mass of selenium is 78.96. The selenium atom has 34 protons, 45 neutrons and 34 electrons. Selenium has several allotropic compounds. Named after the moon, as opposed to tellurium.