Q5 of 27 Page 62

Electronic configurations of elements P, Q, R and S are given below. (These are not actual symbols).

P — 2, 2


Q — 2, 8, 2


R — 2, 8, 5


S — 2, 8


Which among them is a noble gas?

Among the given elements, “S” is a noble gas.

S (2,8) has a complete noble gas configuration. It has maximum number of electrons in the outermost shell. Hence it is a noble gas.


More from this chapter

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5

Electronic configurations of elements P, Q, R and S are given below. (These are not actual symbols).

P — 2, 2


Q — 2, 8, 2


R — 2, 8, 5


S — 2, 8


Which among these elements are included in the same period?

 5

Electronic configurations of elements P, Q, R and S are given below. (These are not actual symbols).

P — 2, 2


Q — 2, 8, 2


R — 2, 8, 5


S — 2, 8


Which are those included in the same group?

 5

Electronic configurations of elements P, Q, R and S are given below. (These are not actual symbols).

P — 2, 2


Q — 2, 8, 2


R — 2, 8, 5


S — 2, 8


To which group and period does the element R belong?

 6

An incomplete form of the periodic table is given below. Write answers to the questions connecting the position of elements in it.


Which is the element with the biggest atom in group 1?