Write the full electron configuration (1 s^2 2 s^2,. etc.) for each of the following elements.

Write the full electron configuration (1 s^2 2 s^2,. etc.)...

Key Concepts

Electron Configuration

Electron configuration refers to the arrangement of electrons in an atom's orbitals or energy levels. This concept is crucial for understanding the chemical properties of an element because the distribution of electrons, particularly in the outer (valence) shell, influences how atoms interact, bond, and react with one another.

Aufbau Principle

The Aufbau principle is a guideline used to determine the order in which atomic orbitals are filled with electrons. It states that electrons occupy the lowest available energy orbitals first before progressing to higher energy levels, ensuring that the overall energy of the configuration is minimized.

Quantum Numbers and Orbital Designations

Quantum numbers describe the properties and energies of electrons in atoms. They help define orbital types indicated by letters (s, p, d, f) and explain their shapes and energy levels. This concept is essential for understanding and constructing the electron configuration of an element by indicating how electrons are distributed among various orbitals.

Periodic Table and Atomic Number

The periodic table organizes elements based on their atomic numbers, which denote the number of protons (and, in a neutral atom, electrons) in an element. This number determines the total electrons available for configuration and provides the framework for understanding how electron configurations are related to an element's position and properties on the periodic table.

Transcript

00:02 This question is for you to write the electron configuration of the following elements.

00:11 So the electron configuration is how the electrons are arranged in an orbital of an atom.

00:19 So for example the first one is calcium here.

00:23 Normally we use our principle to write the electron configuration of such items.

00:29 That principle means but the electrons in some atom is filled from the lowest energy energy level to the highest energy level now we are going to try the first one which is calcium you have calcium atom and the atomic number of calcium atom is 20 so what is mean by atomic number the atomic number is number of protons in a particular atom since this calcium doesn't have any plus charge or minus charges, this is a neutral atom.

01:06 So this 20 number of protons equals to number of electrons.

01:10 That means this calcium atom has 20 electrons in its orbitals.

01:16 Now we are going to write the different configuration.

01:20 So if you should first start with 1 s orbital.

01:23 So you all know like 1 s orbital.

01:29 S -orbital can hold maximum up to two electrons the orbital can hold up to six electrons d orbital can hold up to maximum 10 electrons and finally f can hold totally 14 electrons so you can bear this in mind and we are going to try this first question for the calcium so this we are going to start with 1 is orbital, so it has maximum of 2 electrons, and then 2 s2 and then 2p6.

02:15 So so far they have 10 electrons, but we need another 10 to fulfill this 20...

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