Question

for the group of four atoms or ions provided below, please select the species that are isoelectronic with each other. if none of the species are isoelectronic, please select the none of these species are isoelectronic button. check all that apply. □ as³⁻ □ se²⁻ □ br⁻ □ kr □ none of these species are isoelectronic

Explanation:

Step1: Determine electrons in As³⁻

Arsenic (As) has atomic number 33. As³⁻ has 33 + 3=36 electrons.

Step2: Determine electrons in Se²⁻

Selenium (Se) has atomic number 34. Se²⁻ has 34+ 2 = 36 electrons.

Step3: Determine electrons in Br⁻

Bromine (Br) has atomic number 35. Br⁻ has 35 + 1=36 electrons.

Step4: Determine electrons in Kr

Krypton (Kr) has atomic number 36, so it has 36 electrons.

Answer:

As³⁻, Se²⁻, Br⁻, Kr