Electronic configuration

Front

What is the electronic configuration of the S^-2 ion?

Back

1s² 2s² 2p⁶ 3s² 3p⁶

Front

How do you determine the position of an element in the periodic table from its electronic configuration?

Back

Identify the highest principal energy level (n) for the outermost electrons to find the period, and count the number of valence electrons to determine the group.

Front

What is the electronic configuration for an element in period 4, group 5B?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d³

Front

What is the electronic configuration for an element in period 5, group 2A?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s²

Front

What does the term 'period' refer to in the periodic table?

Back

A period refers to a horizontal row in the periodic table, indicating the highest principal energy level of the electrons in the elements.

Front

What does the term 'group' refer to in the periodic table?

Back

A group refers to a vertical column in the periodic table, indicating elements that have similar chemical properties and the same number of valence electrons.

Front

What is J.J. Thomson known for in atomic theory?

Back

J.J. Thomson is known for discovering the electron and proposing the 'plum pudding' model of the atom.

Front

What is the Quantum atomic theory?

Back

Quantum atomic theory describes the behavior of electrons in atoms as wave functions, leading to the concept of electron orbitals.

Front

How many electrons can the 3d subshell hold?

Back

The 3d subshell can hold a maximum of 10 electrons.

Front

What is the significance of the Aufbau principle in electronic configuration?

Back

The Aufbau principle states that electrons occupy the lowest energy orbitals first before filling higher energy orbitals.