17.An element Y has the electronic configuration 2.8.51010(a) Which period of the periodic table does theelement belong? (1 mark)....................................................................................................................................(b) Write the formula of the most suitable anion formed when element Yionizes(1mark)....................................................................................................................................(c) Explain the difference between the atomic radius of element Y and its ionicradius
Question
17.An element Y has the electronic configuration 2.8.51010(a) Which period of the periodic table does theelement belong? (1 mark)....................................................................................................................................(b) Write the formula of the most suitable anion formed when element Yionizes(1mark)....................................................................................................................................(c) Explain the difference between the atomic radius of element Y and its ionicradius
Solution
(a) The element Y belongs to the 4th period of the periodic table. This is because the highest energy level of an atom is determined by the period it is in. In this case, the highest energy level is 4 (2.8.5.10.10), hence it is in the 4th period.
(b) When element Y ionizes, it is most likely to lose electrons to achieve a stable electron configuration. Given its electron configuration, it would lose 3 electrons to have a full outer shell. Therefore, the formula of the most suitable anion would be Y3+.
(c) The atomic radius of an element is the distance from the center of the nucleus to the outermost shell of an electron. When an atom loses electrons and becomes an ion, its atomic radius decreases. This is because there are fewer electrons, which reduces the electron-electron repulsion and allows the electrons to be pulled closer to the nucleus. Therefore, the ionic radius of Y3+ would be smaller than the atomic radius of Y.
Similar Questions
2.The atomic number of an element Y is 18(i) Write down its electronic arrangement.........................................................................................................................(ii) Give one use of elementY
n which region of the Periodic Table would the element with the electronic structure below be located?1s22s22p63s23p63d104s24p64d65s2A. group 6B. group 8C. group 2D. group 8
7. What is the group and period of an element with an electronicconfiguration of 1s2 2s2 2p6?A. Group 2 period 3B. Group 4 period 2C. Group 8 period 2D. Group 8 period4
10. Study the information below and answer the questions that follow. Letters W, X and Y represent elements in10the periodic table but not the actual symbols of the elementsW has atomic number 8, while X has atomic symbols of the elementsY is in the same period with X and reacts with W to form an ionic compound Y, W(a) Place elements W and X in their correct positions in the grid below which representspart of the periodictable.(b) Write electronic configuration for of the ions in compound Y,W
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)
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.