around it? s have oxygen dot symbol for 0 How many dots does the Lewis B) 2 ) 6 D) 3 D 7 What js the approximate bond angle for CH? B) 109.5 C) 120° D) 107 E) 105 12. Which of the following is an extensive property? A) density B) temperature C) mass D) specific heat E) pressure 13. What is the percent sulfur in iron (III) sulfate? A) 28% B) 32% C) 24% D) 48% E) 4296 14. Which of these elements has the highest first ionization energy\'? A) Cs B) Ga c) ? D) Bi E) As Solution 10. Ans:- option C. 6 dots Explanation :- A Lewis electron-dot symbol is a symbol in which the electrons in the valence shell of an atom or ion are represented by dots placed around the letter symbol of the element . For e.g : - Electronic configuration of Oxygen ( Z= 8) : 1s 2 2s 2 2p 4 , here 6 electrons are in outer most or valence shell therefore Lewis dot symbol of oxygen atom will be : . . [        : O :       ] Hence option C . is the correct answer . .

1. around it? s have oxygen dot symbol for 0 How many dots does the Lewis B) 2 ) 6 D) 3 D 7
What js the approximate bond angle for CH? B) 109.5 C) 120° D) 107 E) 105 12. Which of the
following is an extensive property? A) density B) temperature C) mass D) specific heat E)
pressure 13. What is the percent sulfur in iron (III) sulfate? A) 28% B) 32% C) 24% D) 48% E)
4296 14. Which of these elements has the highest first ionization energy'? A) Cs B) Ga c) ? D)
Bi E) As
Solution
10. Ans:- option C. 6 dots
Explanation :- A Lewis electron-dot symbol is a symbol in which the electrons in the valence
shell of an atom or ion are represented by dots placed around the letter symbol of the element .
For e.g : - Electronic configuration of Oxygen ( Z= 8) : 1s 2
2s 2
2p 4
, here 6 electrons are in
outer most or valence shell therefore Lewis dot symbol of oxygen atom will be :
. .
[ Â Â Â Â Â Â : O :Â Â Â Â Â Â ]
Hence option C . is the correct answer .