U5 Electron Configurations and Quantum Numbers

Front

What is an electron configuration?

Back

An electron configuration is the distribution of electrons in an atom's orbitals, indicating the energy levels and sublevels occupied by electrons.

Front

What does the 's-block' of the periodic table represent?

Back

The 's-block' includes groups 1 and 2 of the periodic table, where the last electron added to the atom occupies an s orbital.

Front

What is the significance of noble gas configurations?

Back

Noble gas configurations simplify electron configurations by using the nearest noble gas to represent core electrons, making it easier to understand the valence electrons.

Front

How do you determine the number of valence electrons in an element?

Back

The number of valence electrons corresponds to the group number of the element in the periodic table, particularly for groups 1, 2, and 13-18.

Front

What is the electron configuration for a neutral atom of nitrogen?

Back

The electron configuration for nitrogen is 1s² 2s² 2p³.

Front

What is the maximum number of electrons that can occupy an s orbital?

Back

An s orbital can hold a maximum of 2 electrons.

Front

What is the electron configuration for calcium?

Back

The electron configuration for calcium is [Ar] 4s².

Front

What are quantum numbers?

Back

Quantum numbers are a set of four numbers that describe the unique quantum state of an electron in an atom, including its energy level, shape, orientation, and spin.

Front

What does the principal quantum number (n) indicate?

Back

The principal quantum number (n) indicates the main energy level of an electron, with higher values corresponding to higher energy levels.

Front

What is the shape of p orbitals?

Back

P orbitals have a dumbbell shape and can hold a maximum of 6 electrons (2 per orbital in three orientations: px, py, pz).