1.

9. Is S2- a predictable ion (meaning Sulfur always makes that ion)? (yes or no)

How do you know? Thoroughly explain why S2- is a predictable ion or not using the position of Sulfur in the periodic table:

Is Ni2+ a predictable ion (meaning Nickel always makes that ion)? (yes or no) =

How do you know? Thoroughly explain why Ni2+ is a predictable ion or not using the position of Nickel in the periodic table:

2. Select the correct list of ions that are isoelectronic to Argon: Group of answer choices

S2-, Br-, Ca2+ S2-,

Cl-, K+ Cl-, Al3+,

K+ Na+, Mg2+, F-

Sc3+, Al3+, Cl-