isoelectric ions. 1) Choose four elements from rows 2 and 3 and write their isoe
ID: 1029537 • Letter: I
Question
isoelectric ions. 1) Choose four elements from rows 2 and 3 and write their isoe 2) Which of the following are isoeletric pairs? O, Ar, S, Ne, Zn, Cs N, As3, N, Xe 3) Consider an element X. What will happen to the ionic radii for the following ions? Give a reasonable explanation to your answer a) If it is Xa b) If it is X 4) Circle the larger of the ions in the following pairs: b) Na or Na or AlP d) Se or Te a) Cl or CI 5) Arrange in increasing order of atomic radi: a) Be, Mg, Ba b) Al, Si, Ge 6) Circle the element that has a higher ionization energy: Cl or Na Mg" or Mg Cl or Br P or Se 7) Identify the element that has the highest and lowest energy? Rb, Mg. I, As, F 8) Identify the element that has the highest and lowest electron affinity S, P, Ga, Li, CI 9) Label the following as acidic or basic oxides. P:O10 Mgo Fe:0s K20 Cr 03 Dr. Gupta/Worksheet-Periodic Properties/Page 1 of 1Explanation / Answer
1)
From row 2
O and F . Their ions are O-2 with 10 electrons
F- with 10 electrons.
From row 3 , Na and Mg
Their ions are Na+ woith 10 electrons
Mg+2 with 10 electrons.
Thus the isoelectroic species are O-2, F-, Na+ and Mg+2 from row 2 and 3.
2) From the given species the isoelectric pairs are
O-2, N-3 , Ne each with 10 electrons.
Ar, S-2 , Ca+2 each with 18 electrons.
Zn , As+3 with 30 electrons.
N has 7 and Xe has 54 electrons.
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