Krypton is a noble gas. Helium, Neon, Argon, Xenon and Krypton are all notoriously reluctant to form compounds and exist as monatomic atoms. Free krypton would not have a charge.
(That, by the way is a standard chemistry groaner: "There's no charge--it's free!"...right up there with "I'm positive I lost my electron.")
Krypton is a noble gas and does not form compounds easily; therefore, we say that it has an oxidation state (charge) of 0. In the rare cases it does form compounds, it has been reported to have an oxidation state of +2.
Krypton is a noble gas meaning it already has 8 elections in its valence shell, and hence stable needing no more or less elections.
Krypton is a noble gas, it does not oxidize.
As with all elements, unless ionized krypton has no charge.
Te or Tellurium
Bromide ion is isoelectronic with Krypton.
Mo^3+ = [Kr] 4d^3
[Kr]4d6 ion has 42 electrons. As it is a 3+ ion, the parent atom would have 45 electrons. This would make it Rhodium Rh.
An ion does have a charge. That is what makes it an ion.
Te or Tellurium
Bromide ion is isoelectronic with Krypton.
Mo^3+ = [Kr] 4d^3
[Kr]4d6 ion has 42 electrons. As it is a 3+ ion, the parent atom would have 45 electrons. This would make it Rhodium Rh.
An ion does have a charge. That is what makes it an ion.
To determine the likely ion formed by an element like Kr (krypton), you need to consider its position on the periodic table. Kr is a noble gas located in the far right column, meaning it has a full valence electron shell and is stable. Noble gases do not readily gain or lose electrons, so Kr is unlikely to form an ion.
The electron configuration of selenium for a 2- ion is [Kr]4s2.3d10.4p6.
This is the electrical charge of the ion.
An atom with a charge (either positive or negative) is called an "ion." An ion with a positive charge is called a "cation" and an ion with a negative charge is called an "anion ."
The charge of the molybdenum ion is +2.
The hydroxide ion has a 1- charge.
The bromide ion has a 1- charge.