Question

Charmaine wants to write the noble gas electron configuration or short-hand electron configuration for Uranium (U). Which noble gas should she use?

A. Xenon
B. Radon
C. Krypton
D. Argon

Answer 1

Charmaine should use the noble gas krypton (Kr) to write the noble gas electron configuration for uranium (U).

Step-by-step explanation:

To write the noble gas electron configuration for Uranium (U), Charmaine needs to determine which noble gas has an atomic number lower than uranium. Looking at the periodic table, we can see that the noble gases are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).

Uranium has an atomic number of 92. Since the atomic number increases as we move across the periodic table, we can compare the atomic number of uranium with the noble gases to find the one with the lowest atomic number. In this case, the noble gas with the atomic number 36, which is lower than that of uranium, is krypton (Kr).

Therefore, Charmaine should use the noble gas krypton (Kr) to write the noble gas electron configuration or shorthand electron configuration for uranium (U).