Which of the pairs of elements show similar chemical properties?, V and W, Y and V, Y and Z, W and X, The elements in a periodic table are arranged according to the, number of electrons, number of neutrons, number of protons, total number of protons and electrons, Which of these elements does not belong to the same group or period as the other three elements?, oxygen, nitrogen, carbon, sulphur, There are .....groups and ..... periods in the periodic table., 18, 7, 7, 18, 17, 8, 8, 17, Element X is non-metal. Its proton number is 8. It is the most abundant element found in earth's crust. X is, magnesium, oxygen, chlorine, sodium, Given the proton number of an element, ..... can be deduced., position of the element in the periodic table, number of electrons in the element, number of neutrons in the element, All of the above, Which is correct?, Calcium has 40 neutrons, Calcium has 20 electrons, Calcium has 40 electrons, Nuclear charge of calcium element is 40, Which of the following has the same group of substances as methane, water and dry ice?, diphosphorus pentoxide, potassium sulphate, copper metal, table salt, How many types of elements in ammonia (NH3+)?, 1, 2, 3, 4, How many atoms in 3 molecules of ammonia (NH3+)?, 4, 8, 9, 12, Which of the the chemical formula of potassium oxide?, PO, KO, K2O, PO2, Element X has valency of +2. Element Y has valency of -1. What is the chemical formula of the compound formed?, X2Y, Y2X, X2Y2, XY2, Which is true?, The valency of noble gas is +1., Valency is the combining power of an element with other element., The sum of the valency of all elements in a compound is 1., All elements have only one valency., Which is correct?, There are 2 sulphate radicals, A sulphate radical has 4 sulphur atoms, A sulphate radical has 4 oxygen atoms, A sulphate radical has 2 positive charges., Which of the chemical formula is correct?, Calcium oxide - CaO2, Gold - Ag, Aluminium oxide - Al3O2, Nitric acid - H2NO3, Magnesium hydroxide - MgOH2, Sodium carbonate - Na2CO3.
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Periodic table
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