potassium sulfide: phosphorus pentachloride: calcium bromide: nitrogen dioxide: Show transcribed image text. The vapor is condensed into phosphorus underwater to prevent ignition. Question: Use the periodic table to determine the molar mass of each of the following compounds. Phosphorus is obtained from calcium phosphate by heating the rock in a furnace to yield tetraphosphorus vapor.
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Contact with white phosphorus can cause chemical burns. Matches made using white phosphorus are associated with a disease known as phossy jaw which causes disfiguration and death. White phosphorus, in particular, is associated with negative health effects. In the human body, it's found in DNA, bones, and as an ion used for muscle contraction and nerve conduction. There are about 750 grams of phosphorus in the average adult. Phosphorus is essential to living organisms.Phosphorus typically has an oxidation state of +3 or +5. The pure element is reactive, so much so that the white form will ignite spontaneously in air. The white form (sometimes called yellow phosphorus) resembles wax, the red and violet forms are noncrystalline solids, while the black allotrope resembles graphite in pencil lead. All types of phosphorus are solid at room temperature. Phosphorus is a poor conductor of heat and electricity, except black phosphorus. While the properties of phosphorus depend on the allotrope, they share common nonmetallic characteristics.Under ordinary conditions, red and white phosphorus are the most common forms. In addition to white phosphorus, there is red, violet, and black phosphorus. There are at least five phosphorus allotropes. The Dipole Polarizability of P is 25 plus or minus 1 a. Like other nonmetals, pure phosphorus assumes markedly different forms. Physical Properties Atomic Radii of the Elements: Phosphorus 0 15 30 45 60 75 90 105 120 135 150 165 180 pm Atomic Radius Covalent Radius Metallic Radius Van der Waals Radius Chemical Properties Other The Gas Basicity of Phosphorus is 604.8 kJ/mol.Some texts refer to phosphorus as the "Devil's Element" because of its eerie glow, tendency to burst into flame, and because it was the 13th known element.Only the white allotrope or form of phosphorus glows in the dark. Although you might think the glow would be phosphorescence, phosphorus is chemiluminescent and not phosphorescent. The name of the element comes from the Greek word phosphoros, which means "bringer of light." The form of phosphorus Brand discovered was white phosphorus, which reacts with oxygen in air to produce a green-white light. Brand called the new element "cold fire" because it glowed in the dark.
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Other elements such as gold and iron were known before that, but no specific person found them. The discovery made Brand the first person to discover a new element. Phosphorus was discovered in 1669 by Hennig Brand in Germany.Discovery: Recognized as an element by Antoine Lavoisier (1777), but officially discovered by Hennig Brand (1669).It may be white, yellow, red, violet, or black. Phosphorus is a solid at room temperature. Multiply the number of atoms by the atomic weight of each element found in steps 1 and 2 to get the mass of each element in Na3PO4: Molar Mass (g/mol) Na (Sodium) 3 × 22.98976928 68.96930784. Sample compounds that contain Phosphorus are H3PO4, Ca3 (PO4)2, Na2HPO4. Phosphorus electronic configuration is 1s 2 2s 2 2p 6 3s 2 3p 3. P stable and long lived isotopes are 31 P: 100. Phosphorus atomic weight is 30.9737622 amu. Appearance: Appearance depends on the allotrope. Phosphorus is an element number 15 from non-metals family.Classification: Group 15 Pnictogen Nonmetal PO4 Element Mass Percent Oxygen 63.9976g Oxygen 63.9976g Phosphorus 30.9738g Phosphorus 30.