![]() The metal reacts with all halogens to form aluminium (III) halides:Ģ Al (s) + 3 Cl 2 (g) → 2 AlCl 3 (s) (aluminium (III) chloride)Ģ Al (s) + 3 Br 2 (g) → Al 2Br 6 (s) (aluminium (III) Bromide)Ģ Al (s) + 3 I 2 (g) → Al 2I 6 (s) (aluminium (III) Iodide) Lattice constant: 404.97, 404.97, 404.97 pmįace Centered Cubic (FCC) Reactivity of AluminiumĮlectron affinity: 42.5 kJ/mol Nuclear Properties of AluminiumĪluminium reacts with air, and forming a protective layer of aluminium (III) oxide, which prevents further reaction with oxygen.ĭue to its protective oxide layer, It doesn’t react with water, But if the oxide layer is damaged, the metal is exposed to attack, even by water. Sound Speed: 5000 m/s Atomic Properties of Aluminium Molar magnetic susceptibility: 0.21×10 -9 m 3/mol Physical Properties of Aluminiumĭensity: 2.70 g/cm 3 (In solid) 2.37 g/cm 3 (In Liquid at M.P) ![]() Mass magnetic susceptibility: 7.8×10 -9 m 3/kg Volume magnetic susceptibility: 0.0000211 Magnetic susceptibility (x mol): +16.5×10 -6 cm 3/mol Thermal conductivity: 237 W/(m∙K) Electrical properties of AluminiumĬritical point (Superconducting point): 1.18 K (-271.97 oC, -457.55 oF) Magnetic Properties of Aluminium Therefore, there are various non-equivalent definitions of atomic radius.Aluminium Electron Configuration Thermal Properties of Aluminium However, this assumes the atom to exhibit a spherical shape, which is only obeyed for atoms in vacuum or free space. The atomic radius of a chemical element is a measure of the distance out to which the electron cloud extends from the nucleus. It must be noted, atoms lack a well-defined outer boundary. The atomic radius of Aluminium atom is 121pm (covalent radius). Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. The atomic mass is carried by the atomic nucleus, which occupies only about 10 -12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Mass numbers of typical isotopes of Aluminium are 27. Isotopes are nuclides that have the same atomic number and are therefore the same element, but differ in the number of neutrons. The difference between the neutron number and the atomic number is known as the neutron excess: D = N – Z = A – 2Z.įor stable elements, there is usually a variety of stable isotopes. ![]() ![]() Neutron number plus atomic number equals atomic mass number: N+Z=A. The total number of neutrons in the nucleus of an atom is called the neutron number of the atom and is given the symbol N. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10 -19 coulombs. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. Atomic Number – Protons, Electrons and Neutrons in AluminiumĪluminium is a chemical element with atomic number 13 which means there are 13 protons in its nucleus. ![]()
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