Write the atomic number of the element present in the third period and seventeenth group of theperiodic table.

Identify the element that is in the 3rd period and group 14 of the periodic table.

. Periods on the periodic table represent elements:1 pointin the same groupwith consecutive atomic numbersknown as isotopeswith similar chemical properties

If the atomic number of an element is 60, it will be placed in the periodic table in the 4th group, 7th period 4th group, 6th period 3rd group, 7th period 3rd group, 6th period

The element in the third group and third period in modern periodic table isA.CarbonB.AluminiumC.BoronD.Cobalt

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)