Beryllium has five neutrons, four electrons and four protons. Its atomic number is 4, and its chemical symbol is Be. This element belongs to the second group on the periodic table, which contains the alkaline earth metal... More »

Beryllium has four electrons, four protons and five neutrons. Beryllium is classified as an alkaline earth metal. This element's atomic weight is 9.012 grams per mole. More »

Beryllium has several roles in industry, including use as an X-ray window, a moderator in nuclear reactors, a part of several alloys and a component in ceramics. It is very light and has a relatively high melting point i... More »

Beryllium has four electrons, four protons and five neutrons. Beryllium is classified as an alkaline earth metal. This element's atomic weight is 9.012 grams per mole. More »

Beryllium has two valence electrons. Valence electrons are those electrons that are capable of participating in the formation of chemical bonds with other atoms. These chemical bonds occur through the sharing of these tw... More »

Potassium has 19 protons, 20 neutrons and 19 electrons. The charges of the protons and electrons cancel each other out, so a neutral atom of potassium has a net charge of zero. More »

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To draw a Bohr model of an atom, first find the number of protons, neutrons and electrons in the atom from its atomic weight and atomic number. After that, place the neutrons and the protons in the nucleus, and draw the ... More »