Which of the following statements is true?
A)The krypton 1s orbital is smaller than the helium 1s orbital because krypton's nuclear charge draws the electrons closer.
B)The krypton 1s orbital is smaller than the helium 1s orbital because krypton's p and d orbitals crowd the s orbitals.
C)The krypton 1s orbital and the helium 1s orbital are the same size because both s orbitals can have only two electrons.
D)The krypton 1s orbital is larger than the helium 1s orbital because krypton contains more electrons.
E)The krypton 1s orbital is larger than the helium 1s orbital because krypton's ionization energy is lower so it's easier to remove electrons.

Question

Quizplus · Accepted Answer

The size of an orbital is determined by the nuclear charge and the effective nuclear charge experienced by the electrons. Krypton has a higher nuclear charge than helium, which draws the electrons closer to the nucleus, making the krypton 1s orbital smaller than the helium 1s orbital. The other options either don't make sense or are not relevant to the size of orbitals.

Which of the Following Statements Is True