Q79 of 400 Page 171

The atomic number of an element Y is 16.

(a) What must an atom of Y do to achieve the nearest inert gas electron arrangement?


(b) Which inert gas is nearest to Y?

(a) An atom of Y should must gain two electrons to attain the nearest gas electron configuration (2,8).

(b) Argon is the inert gas nearest to Y.



More from this chapter

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77 The electric configurations of four particles A, B, C and D are given below

A 2, 8, 8


B 2, 8, 2


C 2, 6


D 2, 8


Which electronic configuration represents:


(i) magnesium atom?


(ii) oxygen atom?


(iii) sodium ion?


(iv) chloride ion?

 78 The atomic number of an element X is 12.

(a) What must an atom of X do to attain the nearest inert gas electron configuration?


(b) Which inert gas is nearest to X?

 80 you can buy solid air-freshners in shops. Do you think these substance are ionic or covalent? why ? 81 Give the formulae of the chlorides of the elements X and Y having atomic numbers of 3 and 6 respectively.

Will the properties of two chlorides be similar or different? Explain your answer.