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The Periodic Table Test: Marks-30 Question 1: Name the following: [6] (a) Two alkali metals and their groups and period. (b) Two alkaline earth metals with their groups and periods. (c) The group to which halogens belong. (d) Elements of groups from 3 to 12. (e) Noble gas with duplet arrangement of electrons. (f) A metalloid of group 14. (g)The bond formed between the atoms of an element of group 2 and group 16. (h)The bond formed between the atoms an element of group 14 and group 17. (i) Pair of elements showing a diagonal relationship. (j) A group in which all gases are present. (k) Two elements whose atomic weights were corrected on the basis of their positions in Mendeleev's periodic table. (l) Atom tends to achieve stable electronic configuration by having two electrons in the first shell. Question 2: Fill in the blanks: [5] a) The name of scientist who is related to the musical notes with classification of elements is ______ and his law is known as ______. b) There are ______ groups and ______ periods in the present form of periodic table. c) Elements having outermost shell incomplete are called ______. d) Modern periodic law is based on ______ and was proposed by ______. e) Moving across the period non-metallic character ______. f) An atom of a group 2 element has ______ in its valence shell. g) All the elements of a period have ______ valency. Question 3: [5] Five elements A, B, C, D and E have atomic number 3,5,12,18,20 respectively. Answer the following questions related with them. (a) Write their electronic configurations. (b) Which element is placed right to A. (c) Which element belongs to same group. (d)Is C electropositive of electronegative (e) Which has a smaller size atom C or E. (f) Name the element placed below A. (g) Name the first element of the group to which D belongs. (h) Write the formula for chloride of B. (i) Write the formula for oxide of A. (j) Name another non-metallic element which belongs to the same period as A. Question 4: Arrange the elements in theA. Increasing order of electro positive nature (Cl, Al, Na, S) B. Decreasing the number of shells (C, Li, Mg, He) C. Increasing non-metallic character (Na, P, Cl, Mg) D. Increasing order of reducing power [2] Question 5. Give reasons for the following. [5] a) Properties of elements are periodic functions of their atomic numbers and not atomic weights. b) A transition from metallic to non-metallic elements is seen on moving from left to right in a period of the periodic table. c) Electron do not fall in the nucleus of an atom. d) Nitrogen and phosphorous are placed in group 15 but different periods. e) Chlorine is a strong reducing agent. Question 6: Fill in the blanks from the words A to F given below. [4] A: Decreases B: Increases C: Remains same D: Increases by one E: Electropositive F: Electronegative 1. Across a period from left to right in the Modern Periodic Table. No. of electron shells ___________; No. of valence electrons __________ by one : Electronegativity _________ Character of elements changes from electropositive to _________ 2. Down a group in the Modern Periodic Table. No. of electron shells ______ by one; No. of valence electrons ________; Electronegativity ______ Character of elements changes from _________ to __________ Question 7: Define and write the parodic trends for the following a) b) c) Ionization energy or ionization potential, Electron affinity, Electro negativity [3]
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