Chemical trends across elements 51–60: atomic radius, ionization, and common oxidation states

Question 1

Which element (51–60) has the largest atomic radius?

Accepted Answer

Cesium

Question 2

Which element (51–60) has the smallest atomic radius?

Accepted Answer

Xenon

Question 3

Which element (51–60) has the highest first ionization energy?

Accepted Answer

Xenon

Question 4

Which element (51–60) has the lowest first ionization energy?

Accepted Answer

Cesium

Question 5

Which element in the range 51–60 commonly shows a +3 oxidation state and is the first of the lanthanides?

Accepted Answer

Lanthanum

Question 6

Which p-block element among 51–60 commonly forms a −1 oxidation state (a typical halogen)?

Accepted Answer

Iodine

Question 7

Which element (51–60) commonly exhibits both +3 and +5 oxidation states and is a metalloid?

Accepted Answer

Antimony

Question 8

Between Tellurium (52) and Praseodymium (59), which has the larger atomic radius?

Accepted Answer

Praseodymium

Question 9

Which element (51–60) is an inert (noble) gas with generally low chemical reactivity?

Accepted Answer

Xenon

Question 10

Which element (51–60) as a Group 1 metal most readily loses one electron to form a +1 ion?

Accepted Answer

Cesium

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