00:01
So here we have been given compounds now if we discuss about hcl now in the case of hcl there is a sharing of electron okay because hydrogen has only one electron and chlorine so it has seven valence electron in its outmost shell so that's why there is a sharing between both of them and this is how the hydrogen completed its duplet and the chlorine completed its octet and so there is a sharing of bond the coblent bond and similarly for ch4 also so in ch4 that is methane so we have one carbon atom and four hydrogen atoms so now hydrogen has one electron only in its outermost shell it wants to complete its duplet so carbon it has four well and it's outermost shell so in such a way when there is a sharing of electron when there is a covalent bond between carbon and hydrogen so there will be the octet will be completed for carbon and the duplett will be completed for each of the hydrogen atom so that's why in hcl and in ch4 we have coblent bonds okay now if we discuss about cacl2 so here calcium so it has atomic number 20 its electronic configuration will be 2 8 8 2 okay so automose shell has 2 electrons 2 valence electron so it consists of 2 valence electron here and now we have chlorine atoms and we have 2 chlorine atoms okay bind to 1 calcium so chlorine has 7 valence electron in its automose shell because it's electronic configuration for item number 17 will be 2, 8, 7.
02:15
So it has 7 valence electrons.
02:20
So now it will be 1, 2, 3, 4, 5, 6.
02:29
And here this is 7.
02:40
And so 1, 2, 3, 4, 5, 6, 7.
02:52
So what will happen that this chlorine, each atom needs 1 electron to complete its octet and this calcium for this here these it wants to donate its two electrons so that it will have complete octet okay to wait it so that's why both of them in this case now calcium after losing two electron and chlorine each atom after gaining one electron they will have complete octet filled fully stable electronic configuration so that's why calcium donates its electron to the chlorine atom and this is how the ionic bond forms between them okay so calcium is a cation chlorine is anion okay calcium donates electron chlorine gains electron so on chlorine there will be negative charge for calcium there will be positive charge so there will be c2 positive because calcium lost is two electron and by doing so now it will have when it has ca2 positive okay so now the electronic configuration is 288 so this is the stable electronic configuration right and for chlorine when it has negative charge each of the atom so now they have electronic configuration like this so this is stable also okay 288 here so that's why so this will be the here ionic compound okay now similarly, we have nacl.
04:48
So sodium has atomic number 11, its electronic configuration is 2 ,8 ,1...