Question

kr 5s²4d⁶ is the electronic configuration for ag⁺². with what element is it equivalent?
○ ag - 2
○ rh
○ in
○ cu
○ ag

Explanation:

• First, find the atomic number of \(Ag\). The atomic number of \(Ag\) (silver) is \(47\). For \(Ag^{+2}\), the number of electrons is \(47 - 2=45\).
• Now, check the atomic numbers of the given elements:
• \(Rh\) (rhodium) has an atomic number of \(45\).
• \(In\) (indium) has an atomic number of \(49\).
• \(Cu\) (copper) has an atomic number of \(29\).
• \(Ag\) (silver) has an atomic number of \(47\). \(Ag - 2\) is not a standard notation for an element.

Answer:

B. Rh