Iodide (I-) ion
Ne-
S
Te or Tellurium
Strontium (Sr) Sr2+ ion and krypton have he same electronic configuration
oxidation number ^o.o^
Negative 2.
S
Oxygen
Te or Tellurium
Yes. it is
Oxidation Number
It is equal to the charge. Oxidation number depends on charge.
Strontium (Sr) Sr2+ ion and krypton have he same electronic configuration
oxidation number ^o.o^
Negative 2.
Helium. (A hydride ion has the same electronic configuration, but hydride is not an element since it has a net electric charge.)
In most cases it is the value of its charge, but not always.
Calcium forms a 2+ ion.