No, they are in different periods.
The noble gas in the same period as Zr (Zirconium) is Kr (Krypton). Both Zr and Kr are in the fourth period of the periodic table.
The element that has the same number of electrons as argon is Krypton (Kr). Both argon (Ar) and krypton (Kr) have 18 electrons in their neutral state.
[Kr] 4d10 5s2 5p2
In the same period as Zr (Zirconium), the noble gas is Kr (Krypton). Both Zirconium and Krypton are in the fourth period of the periodic table.
Noble gases: Ne (neon), Ar (argon), Kr (krypton), Xe (xenon), Rn (radon)
The ratio of effusion rates for two gases is given by the square root of the inverse ratio of their molar masses. The molar mass of Ar is approximately 40 g/mol, and for Kr it is approximately 84 g/mol. So, the ratio of effusion rates for Ar and Kr is √(84/40) ≈ 1.3.
Krypton (Kr) has the same number of electrons as a sulfide ion. Both have 36 electrons.
K+ and argon have the same electron configuration
Krypton (Kr) has the same electron configuration as S2, which is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6.
[Ar] 3d2 4s2
The element with the electron configuration Kr 5s^2 4d^10 5p^2 is Xenon (Xe).
The noble gas core notation for Se-2 is [Kr] 4d10 5s2 5p6.