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

Write the electron configuration of the elements that corresponds to each of the following descriptions. (Use small letters to write your answer)The group VIA element in the Second period:

Identify the period and group of the element having outer electronic configuration as(i) ns2np4for n = 3(ii) (n – 1) d2ns2for n = 4 and(iii) (n – 2) f 7(n  1) d1ns2for n = 6 in the periodic table.

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

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

Read carefully before answering the next two questions:A group is a column (vertical) on the periodic table.A period is a row (horizontal) on the periodic table.Remember when the symbol for an element only has one letter it is written as a capital. However, when the symbol for an element has two letters the first letter is written as a capital, and the second letter is written in lower case.Question 6Not yet answeredMarked out of 1Flag questionQuestion textYou need to consult a Periodic Table for the following question.Write down the symbol of the element in the second group and second period (or energy level) of the Periodic Table.Answer: Question 6Question 7Not yet answeredMarked out of 1Flag questionQuestion textYou need to consult a Periodic Table for the following question.Write down the symbol of the element in the eighteenth group and third period (or energy level) of the Periodic Table.Answer: Question 7