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Class-10th ,, , Test, , Full marks:, Type-1, , Time:, , Date-05/10/19, , *Write the answers either in one word or in a one sentence(, 1. a) On what basis did Mendeleev arranged the elements. b) On what basis are they, arranged now., 2. Name the scientist who gave the following laws:, a) Law of octaves b)law of triads, 3) Name two elements whose properties were predicted on the basis of their position in, Mendeleev`s periodic table., 4. A,B,C are the elements of Dobereiner`s triad .If the atomic mass of A is 7 and that of, C is 39, what should be the atomic mass of B., 5. What is the name of the elements which divide metals and non-metals in the periodic, table?, 6. Name three elements that have a single electron in theie outermost shell., 7. Name three elements with completely filled outermost shells., 8. Mendeleev predicted the existence of certain elements not known at that time and, named the two of them as Eka-aluminium and Eka silicon:, a) Name the elements which has taken place of i)Eka-aluminium ii)Eka-silicon., b) Mention the period of these elements in the modern periodic table., c) Write the group of these elements in the modern periodic table., d) Classify these elements as metals ,non metals and metalloids., 9. What is the usual number of valence electron in the last group of elements?, 10. Name the element which is in thea)first group and third period b)seventh group and, second period., 11. Arrange the elements in increasing order of their atomic radii:, Li, Be, F, N, 12. Arrange the elements in increasing order of their metallic character:, Mg, Ca, K, Ga, 13. the electronic configuration of the atom of an element X is 2,8,4.In the moder, periodic table the element X is placed in which group?, 14.An element X is in group 2 of the periodic table a)What will be the formula of it`s, chloride ., b)What will be the formula of it`s oxide?, 15. Chosse the one which has bigger sizes:Mg or Chlorine., Type-2Fill in the blanks:1.The horizontal rows in a periodic table are called, :………………
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2. If we go from right to left in a periodic table then atomic radii………………….., 3. on going down in a group the metallic character …………….., 4. The tendency to gain an electron……………when we go down in a group, 5.The basis of classification for modern periodic table is……….., 6.Group 17 elements are called ……………, 7.Group 1 st elements are called ………….., 8.Group 18 elements are called …………….., 9.Out of the118 elements………..are naturally occurring elements., 10.when Mendeleev started his work then total no. of elements known were………….., Type-3Multiple choice questions:, 1)The modern periodic table consist of 18 groups and 7 periods.What is the atomic, number of the element placed in the 1 st group and the 4 th period :, a., b., c., d., , 21, 17, 19, 9, , 2)In Moseley` periodic table elements are arranged according to :, Increasing atomic number, a. Increasing atomic weight, b. Increasing reactivity, c. None, 3.Which elements in the periodic table are chemically inactive:, a., b., c., d., , Inert gases, Transition elements, Inner transition elements, Eath metals10/5/2019, , 4.Which group of periodic table are known as s-block elements?, a., b., c., d., , 1 and 2, 3 and 12, 13- 18, None, 5.What is the atomic number of the element lying in 4th group mand 4th period?
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a. 24, b. 20, c. 22, d. none, 6.Modern periodic law had been given by:, a.)Moseley, b)Newland, C)Mendeleev, d)Lavoisier, 7.Which of these elements are also called semi-metals:, a)Metals, b)Non-Metals, c)Metalloids, d)Gases, 8.Which metal is the heaviest among the following?, Os b. Pt c. Ca d. W, 9.Which block of the elements are also called inner transition elements:, a. d-block b. f-block c. s- block d. p-block, 10.How many elements are in the 5 th group of the periodic table:, a)2 b)18 c)36 d)18, *Write true or false:, a)Elements in the group 7 is 18.i, b)Modern periodic law was given by Lavoisier., c)There Were63 elements known during the Mendeleev time., d)The elements in a group have consecutive atomic numbers., e)The metals are found in p-block elemens., , Note: for maths video :cbsemathsacademy on u -tube
