Study the information given in the table below and answer the questions that follow.The letters do not represent the actual symbols of the elementsElement Atomic number Boiling point (K)S 3 1603T 13 2743U 16 718V 18 87W 19 1047(a) Select the elements, which belong to thesame(i) Group (1mark)....................................................................................................................................(ii) Period (1mark)....................................................................................................................................(b) Whichelement(i) Is in gaseous state at room temperature?Explain(Take room temperature tobe298K) (2marks)........................................................................................................................................................................................................................................................................(ii) Does notformoxide? (1mark)....................................................................................................................................(c) Write the(i) Formula of the nitrate ofelement T (1 mark)10....................................................................................................................................(ii) Equation for the reaction between elements SandU

Study the information in the table below and answer the questions that follow. Theletters do not represent the symbols of the elements.Element(C) Atomic number Melting pointL 11 97.8M 13 660N 14 1440Q 17 401R 19 63.7a) Write the electrons arrangement for the atom formed by elements and M andQ........................................................................................................................................................................................................................................................................b) Select an element whichisi) The most reactive non –metal...........................................................................................................................ii) A poor conductor ofelectricity...........................................................................................................................c) In which period of the periodic table does elements Rbelow.....................................................................................................................................d) Element R lodes its outermost electron more readily than I.Explain

Study the data in the table below and answer the questions that follow. The letters donot represent actual symbols of theelementsElement Atomic No. M.P. 0 (C) B.P. 0(C) Ionic radius (nm)A 11 98 890 0.095B 12 650 1110 0.065C 13 660 2470 0.050D 14 1410 2360 0.41E 15 44.2, 590 280 0.0340.212F 16 113119445 0.184G 17 -101 -35 0.181H 18 -189 -186(a)(i)Write electronic arrange for the atoms represented by letters B and F.............................................................................................................................................................................................................................................................................10(ii) State the nature of the oxides of the elements represented by B and F..............................................................................................................................................................................................................................................................................(b) Why does the element represented by letter E have two values of meltingpoint?............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(c) Explain the following observations in terms of structure andbonding(i) There is an increase in boiling point from A toC.................................................................................................................................................................................................................................................................................................................................................................................(ii) Element D has a high boilingpoint.................................................................................................................................................................................................................................................................................................................................................................................(iii) There is a decrease in boiling point E toH.....................................................................................................................................................................................................................................................................................................................................................................................................................(d) Explain the difference in ionic radius between elements represented by letters A andG............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................(e) Write the formulae and the electronic arrangement of the two ions E whose ion radiusare shown in thetable.............................................................................................................................................................................................................................................................................

(a) Study the information in the table below and answer the questions that follow. Theletters do not represent the actual symbols of theelements.Element Atomic number Melting pointofelementFormula ofchlorideMelting pointof chlorideG 11 98 GCI 801H 12 650 HCl 2 715J 14 1410 JCl 4 -70K 16 113 K 4 Cl 2 -80L 20 851 LCl 2 780(i) Which elements are metals? Giveareason (2marks)........................................................................................................................................................................................................................................................................(ii) Write the formula of the compound formed when element H reacts withelement(1 mark)....................................................................................................................................(iii) Explain why the melting point of J is higher than thatof K (2marks)............................................................................................................................................................................................................................................................................................................................................................................................................(iv) What is the oxidation state of J initschloride? (1mark)....................................................................................................................................(v) How doesthe:-Melting point of the fluoride of G compare with that of its chloride?10Explain (2marks)............................................................................................................................................................................................................................................................................................................................................................................................................-Reactivity of H and L with water compare? Giveanexplanation

7.The table below gives some information about elements represented by letters B, C, Dand E. Study the information and answer the questions that follow:Element Atomic radii (nm) Melting Point 0 CB 0.152 180C 0.186 98D 0.231 64F 0.244 39(i) Would these elements form part of group orperiod?Explain. (2 marks)............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................10(ii) What does the trend in melting points suggest about the nature of theelements(1 mark)..............................................................................................................................................................................................................................................................................

3.(a) The table below shows the atomic numbers of elements of the periodic table representedby letter J toQ.The letters are not the actual chemical symbols for the elementsElement J K L M N P O QAtomicnumber3 7 8 9 10 12 13 1410(i) Select two elements which belongto:I The same period of theperiodictable (1 mark)..............................................................................................................................................................................................................................................................II The same group of the periodictable.............................................................................................................................................................................................................................................................(ii) Select theelementwhich (1 mark)I Will form a divalentunion....................................................................................................................................................................................................................................................................II Reacts most vigorously withwater.....................................................................................................................................................................................................................................................................(b) The boiling points of some chloride are shown in the tablebelow:Group I II III IV V VI VIIChloride LiCl Chlorideof WBCl 3 CCl 4 NCl 3 OCl 2 FClB.P. ( 0 C) 1350 487 12 77 71 2 -101Chloride Nacl Mgcl 2 AlCl 3 Chlorideof XPCL 3 SCl 2 Cl 2B.P. ( 0 C) 1465 1418 Sublimesat 18057 74 59 -35(i) What is the most likely formulae for the chlorides of W andX?...................................................................................................................................................................................................................................................................(ii) Select two chlorides from the table which are the most ionic. Explain why the twoelected chloride are the mostionic.......................................................................................................................................................................................................................................................................(iii) Would you expect group VIII elements of the periodic table to form chlorides?Explaintheanswer (1mark)