logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
0 votes

Which of the following regarding Helium is incorrect?

(1) When two helium atoms come close to one another, replusive forces overcome attractive forces

(2) All noble gases have 8 valence electrons

(3) Helium forms a compound with fluorine because of its closed shell configuration

(4) Helium is preferred to Hydrogen for filling gas balloons because its lighter and non-inflammable

$\begin{array}{1 1} Only\; (2)\; and\; (4) \\ Only \;(3)\; and\; (4) \\ (2),(3)\;and\;(4) \\ (1),(2),(3)\;and\;(4) \end{array}$
Can you answer this question?
 
 

1 Answer

0 votes
Answer: (2), (3) and (4) are incorrect.
(1): This is the reason a helium molecule is not formed. This statement is correct.
(2): All noble gases EXCEPT He have 8 valence electrons
(3): He being smaller in size posses a high ionization energy and cannot be excited to a higher level and thus does not form a compound with flourine.
(4): Helium is preferred to Hydrogen for filling gas balloons but is heavier than Hydrogen, although non-inflammable
answered Jul 27, 2014 by balaji.thirumalai
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...