Question

state true or false with perfect reason :-
1.the electronic configuration of Na positive ion is different from that of an Ne atom .
2. Helium being a noble gas has a 8 electrons in valence shells .
3.a magnesium atom gains two electrons to attain octet .
4.an oxygen atom gains two electrons to attain the octet .
5.chlorine conformed both ionic and covalent bond .

please answer all the true false with perfect reason it's urgent

Answer 1

Here is your answers....
A. The statement is false.
because Na losses its one electron to attain nearest noble gas configuration. its nearest one is..NEON. so Na+ configuration is same as that of Ne.
B. Again False.
because He has only 2 electrons in its valence shell.
C.False.
remember Metals tend to lose electron to gain stability. Mg is a metal and it loses 2 electrons to attain stability.
D.True. oxygen is a non metal . It has 6 e- in its valence shell . so to attain stability it gains 2e-.
E. True.
Chlorine is the 2nd most electronegative element after flourine. There are compounds in which chlorine forms ionic bond like NaCl ,MgCl2 etc .
covalent compounds of chlorine are CHCl3 , CCL4 etc...