What is the electron arrangement N3?
The nitride ion, N3ˉ, has an electron arrangement of 1s2, 2s2, 2p6
The elemental nitrogen, N, has an electron arrangement of 1s2, 2s2, 2p3. Since the nitride ion, N3-, has 3 extra electons, those 3 extra electrons fill the 2p orbital giving the electron arrangement above. This stabilizes the nitride ion because it is similar to a noble gas.
An atom is called an ion, when the atom either gains or loses an electron from its electron arrangement/structure. Their are two types of ions: A positive ion, is when an electron is lost from an electron arrangement/structure. A negative ion is when an atom gains an electron, into its electron arrangement/structure.
What wavelength should the astrophysicist look for to detect a transition of an electron from the n5 to the n3 level?
An octet electron arrangement is where an atom has 8 valence electrons. It's very stable and unreactive. Some metal atoms tend to donate its electrons and the electrons accepted by non-metal atom. This is called ionic bonding. Some non-metal electron share electron among themselves to achieve octet electron arrangement. This is called covalent bonding. Conclusion is, all elements achieve octet electron arrangement.
The shape of a molecule only describes the arrangement of bonds around a central atom. The arrangement of electron pairs describes how both the bonding and nonbonding electron pair are arranged. For example, in its molecular shape, a water molecule is describes as bent, with two hydrogen atoms bonded to an oxygen atom. However, the arrangement of electron pairs around the oxygen atom is tetrahedral as there are two bonding pairs (shared with the hydrogen)…