Gp 13=ns2 np1 Gp 14=ns2 np2 Gp 15=ns2 np3 Gp 16=ns2 np4 Gp 17=ns2 np5 Gp 18=ns2 np6
A noble gas electronic configuration has an outer shell of ns2, np6. Examles of ions with this configuration are O2- [He], 2s2 2p6 (the neon configuartion) Cl- [Ne] 3s2 3p6 (the argon configuration)
For helium it is 1s2. For the other noble gases it will be ns2 np6 where n is the period in which the noble gas in present.
All the elements in the same group have (usually) the same configuration of the valence electrons. For example, second-group elements (alkaline earth metals) all have ns2 configuration (where n=2-7). All halogens have ns2np5, etc. The similarity of electron configuration results in similarity of chemical properties.
There is none because there is no noble gas above Helium
pls tel me the scope of ns2
Gp 13=ns2 np1 Gp 14=ns2 np2 Gp 15=ns2 np3 Gp 16=ns2 np4 Gp 17=ns2 np5 Gp 18=ns2 np6
you don't need to use ns2 programming
Linear
ns1 or ns2
Currently NS2 development by VINT group is supported through Defense Advanced Research Projects Agency (DARPA) with SAMAN and through NSF with CONSER, both in collaboration with other researchers including ACIRI (see Resources). NS2 is available on several platforms such as FreeBSD, Linux, SunOS and Solaris. NS2 also builds and runs under Windows.
halogens
Segmentation errors appear in NS2 because pointers in the source code sometimes cause errors. If you encounter one of these errors first cut your off and back on again. Many times this will make the error go away. If it does not you may need to contact the makes of NS2 for advice.
For main group chemistry, the trend followed would be as such, where "n" is the valence orbital: ns1 = group 1 ns2 = group 2 ns2 np1 = group 3 (also called group 13) ns2 np2 = group 4 (also called group 14) ns2 np3 = group 5 (also called group 15) ns2 np4 = group 6 (also called group 16) ns2 np5 = group 7 (also called group 17) ns2 np6 = group 8 (also called group 18) This rule can only be successfully applied to main group chemistry, the D and F blocks (transition metals, lanthanides and actinides) do not follow this.
[noble gas]ns2 np6
[s=n-s]-1
Nitrogen