Example: 1 Balance the given redox reaction: H 2 + + O 2 2--> H 2 O. Considering the equation above, we have 2 hydrogen (H) with the total charge +1[Refer the charges of the elements in the above table] and 2 oxygen (O) with the total charge -2 on the L.H.S and 2 hydrogen (H) with total charge +2 and only 1 oxygen (O) with the total charge -2 on the R.H.S.
Aluminium definition, variant of aluminum. See more. a light malleable ductile silvery-white metallic element that resists corrosion; the third most abundant element in the earth''s crust (8.1 per cent), occurring only as a compound, principally in bauxite.
Elements and Compounds An Atom. Atom - smallest unit of all matter, that is composed of 3 sub-atomic particles called protons, electrons and neutrons; Proton - the ''heavy'' positively-charged particle in the nucleus of an atom; Electron - the very ''light'' negatively-charged particle that orbits the nucleus of an atom; Neutron - the ''heavy'' uncharged particle in the nucleus of an atom
Valency of the following elements: Magnesium – 2 Aluminium – 3 Chlorine – 1 Copper – 2. Question 6. What is polyatomic ton? Give one example. Answer: A group of atoms carrying a charge is known as a polyatomic ion. E.g., Ammonium – NH 4 + Nitrate – N0 3 – Question 7. Write down the formula for: Copper nitrate, calcium sulphate and ...
Nov 30, 2020· How do you know the Order of Elements in a Chemical Formula What is Chemical Formula? A chemical formula is a representation of a chemical substance using letters for atoms and subscript numbers to show the numbers of each type of atoms that are present in the substance. Based on the chemical formula of a substance, we know the composition of the substance.
56. (a)Write one reaction in which aluminium oxide behaves as a basic oxide and another in which it behaves as an acidic oxide. (b)What special name is given to substances like aluminium oxide. (c)Name another metal oxide which behaves like aluminium oxide. Solution: (a) Al 2 O 3 + 6HCl → 2AlCl 3 + 3H 2 O. Aluminium here acts as basic oxide
Iron sulphate and aluminium sulphate (alum) Chemically these com-pounds are FeSO 4.7H 2 O and Al 2 (SO 4) 3.18H 2 O respectively. Both these solid granular materials usually have a nigh degree of purity and are soluble in water.
"Sulfate" is the spelling recommended by IUPAC, but "sulphate" was traditionally used in British English.. Structure. The sulfate anion consists of a central sulfur atom surrounded by four equivalent oxygen atoms in a tetrahedral arrangement. The symmetry is the same as that of methane. The sulfur atom is in the +6 oxidation state while the four oxygen atoms are each in the −2 state.
d) Carbon is the element which shows maximum valency. 49. An element X which is a yellow solid at room temperature shows catenation and allotropy. X forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and …
Dec 04, 2019· (iii) An aluminium wire ... The electrolysis of copper sulphate solution is used in the purification of copper using pure copper plate as cathode and impure copper plate as anode. ... Element X is a metal with a valency 2. Element Y is a non-metal with a valency 3. (i) Write equations to show how X and Y form ions.
Nov 18, 2019· But, in magnesium chloride (MgCl 2) valency of magnesium is two because it combines with two chlorine atoms. 2. Valency with respect to oxygen: Valency can be defined as double the number of oxygen atoms with which one atom of an element can combine because valency of oxygen is two. For example, in magnesium oxide (MgO) valency of magnesium is two.
Aug 05, 2015· Activity :- Take some sodium sulphate solution in a conical flask and some barium chloride solution in an ignition tube. Hang the ignition tube in the flask by a thread and pot a cork on the flask. Find the mass of the flask on a balance. Then tilt the flask. A chemical reaction takes place and sodium chloride and barium sulphate are formed.