Danyal Education. Unit 10 Structure of the Periodic Table. A Group II. B Group V C Group VI. o o. o o

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1 Unit 10 Structure f the Peridic Table Multiple- Chice Qrestins 1. A bar chart fr sme elements is shwn belw NOF Element Ne Na Mg Which f the fllwing culd the vertical axis represent? A the number f uter shell electrns in an atm f the elemenl B the number f prtns in an atm f the element C the grup number f the element D the ttal number f electrn shells in an atm f the element () 2. The 'dt-and-crss'diagram f a cmpund cntaining element B and hydrgen is shwn belw OX E EX x E OX Which grup in the Peridic Table des element E belng t? A Grup II B Grup V C Grup VI D Grup = electrn f E X = electrn f Danyal Educatin 3. Rhenium, Re, is in the same grup as manganese. What is the frmula f ptassium rhenate(vii)? A KReO B KrReO C KReO, D KReO, () ()

2 4. An element X frms tw different xides, XO and XOr. Which grup f the Peridic Table is X in? A Grup I B Grup II C Grup IV D Grup VI ( ) 5. Selenium and sulfur are in the same grup f the Peridic Table. Which f the fllwing shws the crrect frmulae f the cmpunds f selenium? A SeOr; NarSe;NarSeO B SeOr;NaSe; NarSeO* C SeO.,; NarSe;NaSerO, D SeO,;NaSe;NaSeO. ( ) Structured Qrestins 1. Thallium (T/) is an element with a prtn number f 81. Use the Peridic Table t help yu answer the fllwing questins abut thallium. (a) (i) Which grup f the Peridic Table is thallium in? (ii) w many uter shell electrns des an atm f thallium have? (iii) What is the likely frmula f a thallium in? (b) Wuld yu expect thallium t be a metal r a nn-metal? Give a reasn t2) (c) Estimate the number f neutrns present in a typical thallium atm. Shw hw yu arrived at yur answer. l2l Danyal Educatin

3 2. Sme prperties f the first fur Grup VII elements are given in the table. Element Cmplete the table by adding the prperties fr flurine. 3. Part f the Peridic Table is given belw. The letters are nt the actual symbls f the elements. v Y w Prtn number Flurine 9 Chlrine t7 7t Yellwish-green Brmine Reddish-brwn Idine Vilet Fr each f the fllwing statements, decide whether the statement is true r false. Give yur reasns. (a) V is mre reactive than Y (b) V is mre metallic than W Relative atmic mass (c) Y has a higher melting pint than V N. f valence electrns Melting pint ("c) Biling pint ("c) Clur f vapur Danyal Educatin (d) Atms f X are bigger than atms f Z. x z t4l Ltl

4 4. Sme elements in Perid 3 f the Peridic Table are shwn belw. x Mg A/ Si P S Y z (a) Name elements X,Y andz. (b) w many ccupied electrn shells d the atms f these elements have? (c) w des the number f valence electrns in the atms change as we mve frm X t Z?[1] (d) The atms becme smaller mving acrss the perid frm left t right. Explain this trend.[2] (e) (i) Which element has the greatest tendency t gain electrns? (ii) Which element has the greatest tendency t lse electrns? 5. Element Y frms an in, Y*, and its 'dt-and-crss'diagram is shwn belw Danyal Educatin [, ' l,,]. (a) Which grup f the Peridic Table des Y belng t? Explain yur answer. tzl

5 (b) Explain hw an atm f Y achieves a stable ctet structure in the in Y* (c) Write the frmula f the in frmed by Y itself thrugh electrn transfer. (d) (i) Give the frmula f the cmpund frmed by sdium and Y (ii) State the bnding in the cmpund in (d)(i) [11 6. The table shws the prperties f fur elements. Element Melting pint ("C) Density (g cm-') Number f knwn chlrides P tt R S t523 l.1t 1 (a) Which element is mst likely t be a metal? Give yur reasn. l2) (b) Which element is mst likely t be a Grup II metal? Give yur reasn t2) (c) Which element is mst likely t be sulfur? Explain yur answer. Danyal Educatin 12l (d) Which element is mst likely t be brmine? Explain yur answer. t2t