It could be either Sn2+ ion (stannous ion) or Sn4+ ion (stannic ion)
A tin atom has an electron configuration with the first 3 shells full. Then 5s2 4d10 5p 2. However the most common stable ion of Tin has a charge of +4, as in SnCl4. Now the electron configuration is 4s2 3d10 4p6 5s0 4d10 5p 0 . $ electrons have been taken by the 4 Chloride's.
Na+ is the formula of the ion formed when sodium achieves a stable electron configuration.
P3-
Ca2+
s2,s2 p6.s1
P-3 ion is formed with 18 electrons.
Sodium looses one electron to achieve noble gas electronic configuration.The formula of ion formed is Na+
Sulfur atoms will gain two electrons in order to achieve a noble gas electron configuration. A sulfide ion has the formula S2-.
P3- or phosphide ion is formed. it has the same number of electrons as the noble gas, argon
Sodium looses one electron to achieve noble gas electronic configuration.The formula of ion formed is Na+
Na+ ion.
K+
K+And the K ion configuration is 1s2 2s2 2p6 3s2 3p6Noble gases have the configuration up to 3p6Pseudo noble gases have it up to 3d10