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Which of the following has the highest atomic number?

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in Chemistry – Class 12 by (188k points)
Which of the following has the highest atomic number?

(a) Scandium

(b) Titanium

(c) Cadmium

(d) Lanthanum

I have been asked this question in my homework.

Asked question is from Electronic Configurations of the D-Block Elements topic in chapter D and F-Block Elements of Chemistry – Class 12

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Right option is (d) Lanthanum

To elaborate: In the periodic table, when you move down the group, the atomic number increases. In the given options, scandium and titanium belong to the 3d series, cadmium belongs to the 4d series and Lanthanum belongs to the 5d series. Therefore, Lanthanum will have the highest atomic number.

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