Which of the following pairs are NOT isoelectronic?   a. F- and Mg2+   b. Cl- and Ca2+   c. N3- and O2-   d. B3+ and N3-

Why do most monatomic cations of the main-group elements have a charge equal to the group number? Why do most monatomic anions of these elements have a charge equal to the group number minus eight?

Which of the following pairs of ions represent isoelectronic species?   A. Na⁺ and N²⁻ B. Al³⁺ and O²⁻ C. K⁺ and Na⁺ D. Cl⁻ and F⁻ E. Al³⁺ and P³⁻

Which one of these ions is not isoelectronic with Ar? A. S²- B. Ca2+ C. Fe2+ D. CH E. K+

Which of the following pairs of ions/atoms are isoelectronic?   Group of answer choices A. Ba2+ and Rn B. K and Ar1+ C. Mg2+ and F1- D. Al3+ and Mg1+

Which family in the periodic table has the following general electron configuration, [NG] ns2np4, where NG represents a noble gas?   Group of answer choices A. Group IVA B. Group VIA C. Group IIA D. Group VIB

5. Isoelectronic ions are the species that have the same number of electrons. Part a. What +2 ion is isoelectronic with Na+? What -2 ion? Part b. Which of the following has (have) the same electron configuration as (isoelectronic with) Ar? A. K- B. Ca2+ C. 02- D. CI-

Which of the following is Not isoelectronic with Argon A. K+   b. P3-        C.   Ca+2     D.   Si4+

What is the ground state electron configuration for the phosphide ion (P3-)? O A. [Ne] 3p3 O B. [Ne] 3s2 3p3 O C. [Ne] 3s2 O D. [Ne] 352 3p6

Which of the following species is isoelectronic with Kr? Question 11Select one: a. Cl1− b. Mg2+ c. Se2− d. S2+ e. Ne