10. Periodic Properties of the Elements

Yttrium has an atomic number of 39. Which electron configuration best represents yttrium?

What is the electron configuration of gallium (Ga)?

How many electrons are present in the second energy level (n = 2) of a neutral lithium atom?

Which of the following wavelengths corresponds to the energy required to excite a hydrogen atom from the n=2 state to the n=5 state?

Which of the following electron configurations represents an excited state for an atom of calcium?

Which of the following orbital diagrams correctly represents the ground state electron configuration of nitrogen (N)?

Which of the following represents the noble gas electron configuration for sulfur (S)?

When an electron moves from the first energy level (n = 1) to the second energy level (n = 2) in an atom, which of the following occurs?

Which of the following represents the correct electron configuration for helium?

Which of the following is the correct electron configuration for calcium (Ca)?

Which of the following correctly represents the orbital diagram for a neutral sulfur atom?

Which of the following represents the correct electron configuration for a neutral atom of neon?

Which element has the following orbital diagram? 1s: ↑↓ 2s: ↑↓ 2p: ↑↓ ↑↓ ↑↓ 3s: ↑↓ 3p: ↑↓ ↑↓ ↑↓ 4s: ↑↓ 3d: ↑↓ ↑↓ ↑↓ ↑↓ ↑↓

Which of the following is the correct electron configuration for selenium (atomic number 34)?

In an atom, where are the electrons with the highest energy typically located?