Problem: Consider the element with the electron configuration [Xe]6s24f7. This element is (a) a representative element. (b) a lanthanide element. (c) a nonmetal. (d) an actinide clement. (e) a noble gas.

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Consider the element with the electron configuration [Xe]6s24f7. This element is 

(a) a representative element. 

(b) a lanthanide element. 

(c) a nonmetal. 

(d) an actinide clement. 

(e) a noble gas.

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Based on our data, we think this problem is relevant for Professor Rasasingham's class at Acupuncture and Integrative Medicine College - Berkeley.