CBSE Class 9 Answered
why element Helium and Argon are chemically inactive?
Asked by snaik0856 | 29 Dec, 2019, 09:47: PM
Expert Answer
Helium has 2 electrons in its outermost orbit and argon has 8 valence elctrons in its outermost orbit.
That is helim and argon have stable electronic configuration. So these elements have no tendency to gain or lose electrons.
Therefore these elements are unreactive that is chemically inert.
Answered by Varsha | 30 Dec, 2019, 09:15: AM
Concept Videos
-
Bohr's Model and Electronic Configuration
This video explains the Bohr's model of an atom and the electronic configur... -
Valence Electrons and Octet Rule
This video explains valence electrons and the duplet and octet rules. -
Structure of Atom - Exam Decoded - 3
This video contains questions on the Bohr's model of an atom, electronic co...
CBSE 9 - Chemistry
Asked by archanakad | 25 Aug, 2020, 08:59: PM
ANSWERED BY EXPERTCBSE 9 - Chemistry
Asked by Jaiwanthsiva | 15 Apr, 2020, 01:51: PM
ANSWERED BY EXPERTCBSE 9 - Chemistry
Asked by Jaiwanthsiva | 12 Apr, 2020, 11:47: AM
ANSWERED BY EXPERTCBSE 9 - Chemistry
Asked by snaik0856 | 29 Dec, 2019, 09:47: PM
ANSWERED BY EXPERTCBSE 9 - Chemistry
Asked by Regiesmalom99 | 18 Oct, 2019, 01:36: PM
ANSWERED BY EXPERTCBSE 9 - Chemistry
Asked by Vishalgarg1234 | 25 Nov, 2018, 03:21: PM
ANSWERED BY EXPERTCBSE 9 - Chemistry
. Then i have to first react Carbon with Oxygen then react that compond with calcium. So how will i know the valency of compound formed from reaction of carbon with oxygen. We can know the valency of elements from their atomic number and electronic configuration, but how can i know the valency of compound?
Please help,waiting for your reply,
Thank you. Asked by hk.sachdev | 12 Oct, 2018, 10:38: PM
ANSWERED BY EXPERTCBSE 9 - Chemistry
Asked by sshivali3333 | 19 Sep, 2018, 11:06: AM
ANSWERED BY EXPERTCBSE 9 - Chemistry
Asked by Topperlearning User | 13 May, 2014, 12:49: PM
ANSWERED BY EXPERTCBSE 9 - Chemistry
Asked by Topperlearning User | 13 May, 2014, 12:50: PM
ANSWERED BY EXPERT