Group of chemical elements - Americium. Was synthesized in 1944-45 by Glenn T. James, and Leon O. Morgan, at the Metallurgical Laboratory of the University of Chicago by irradiation of Plutonium with neutrons. Discovery it became clear that the heavy transuranium elements. Contains six 5f electrons, and it is similar to europium which contains six 4f electrons. That was the reason to name the element number 95 americium.

Element Antimony, Sb, Metalloid. Is allied on the one hand to bismuth, and on the other, to arsenic and phosphorus. It therefore forms a transition element between the metals and the non-metals, but is still essentially on the side of the metals. Its combining weight is Sb. Probably, therefore, we are dealing with a mixture of different kinds of vapour, perhaps Sb. Is known from high antiquity. Oriental countries were familiar with Antimony.

Element Argon Ar, Noble Gas. obtained from chemical compounds, in having a somewhat greater density.

Element Arsenic, As, Metalloid. In accordance with its smaller combining weight, arsenic. Deviates still more than antimony from the type of the metals, and exhibits greater similarity to the non-metal phosphorus; at the same time the tendency to form acid compounds increases. In fact the resemblance of arsenic to phosphorus is so great that it might also have been treated along with that element among the non-metals. If the vapour of arsenic. At the same time, other kinds of amorphous arsenic are formed.

Element Barium, Ba, Alkaline Earth Metal. Has the combining weight 137. 4, and occurs naturally as sulphate and carbonate. Metallic barium is of a white colour, melts at a red heat, and reacts more energetically with water than strontium or calcium. We have here, therefore, a repetition of the same state of affairs as in the group of alkali metals, viz. the action with oxygen and oxygen compounds is more energetic the higher the combining weight of the metal. Barium forms only the divalent ion Ba.

Element Beryllium, Be, Alkaline Earth Metal. Occupies the same position among the alkaline earth metals as lithium does among the alkali metals. Its combining weight is the smallest, and its similarity to the other elements of the group is least. Its properties exhibit a distinct tendency towards the next group, that of the earth metals. The combining weight of beryllium amounts to 9. Besides the typical divalent ion Be. Beryllion forms various salts, of which the chloride, Be. And the sulphate, Be.

Element Bismuth, Bi, Poor Metal. For the purposes of analysis, bismuth. Bismuth readily forms alloys with other metals whereby, in accordance with the general law, the melting point sinks. The combining weight of bismuth has been determined by weighing the metal and the oxide obtained from it. It is not known with perfect certainty, and we shall take it as Bi.

The first experiments were started in 1976 by a Soviet team led by Y. Oganessian at the Joint Institute for Nuclear Research at Dubna, who produced isotope Bohrium-261. With heavy nuclei of Chromium-54. In this experiment the was performed by bombarding of the fast rotating cylinder coated by a thin layer of Bismuth-204. By a tangentially directed stream of Chromium-54. German scientists have offered name Nielsbohrium.

Element Boron, B, Metalloid. Among the non-metallic elements, boron. Containing carbon, and obtained from the two elements at a very high temperature, is of a similar character, and also possesses an adamantine hardness. This also ought most probably to be regarded as a solid solution, and not as a chemical compound. The combining weight of boron is B. Have been known of for thousands of years. Century a substance was disengaged from burah. Which was called boronic acid. And Davy called it boron.

Element Bromine, Br, Halogene. The vapour of bromine is very heavy. If a small bulb filled with bromine be broken, or if, by means of a pipette, a drop of bromine be placed at the bottom of a large, empty bottle, it is seen that the brown-yellow vapour produced remains at the bottom and sways heavily when the bottle is moved. Only after standing undisturbed for a considerable time does the bromine.