What is the maximum number of electrons in an atom's outermost shell?
Atoms are the basic units of matter that make up everyday objects. Atoms are made up of three subatomic particles: protons, neutrons, and electrons. Atoms can combine to form molecules, which are the building blocks of all living things.
Atoms: Building Blocks of Matter
Would you rather be an electron in a superconductor or a free electron in space?
- Be an electron in a superconductor
- Be a free electron in space
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Electron configuration is the arrangement of electrons in an atom or molecule according to the principles of quantum mechanics. The Pauli exclusion principle states that two electrons in an atom cannot have the same set of quantum numbers. The Aufbau principle states that electrons fill the lowest energy orbitals first, and electrons will fill orbitals of equal energy in order of increasing size.
The first electron shell can only hold a maximum of 2 electrons, while the second shell can hold up to 8 electrons. The electron configuration of an atom can be used to predict its chemical properties. The orbitals of electrons in an atom can be represented using 3-dimensional diagrams called orbital diagrams.
Did you know?
Work together in pairs: What is the full electron configuration for the element calcium?
What is the electron configuration of a chlorine atom and how many unpaired electrons does it have?
Work together in pairs: What is the electron configuration of a neutral atom of sulfur?
Brain break: Draw a monster with tiny eyes, 3 horns on its head and 6 tentacles for arms.
What does the electron configuration of an atom describe?
- The arrangement of electrons in different energy levels or orbitals
- The number of protons and neutrons in the nucleus
- The isotopes present in the atom
What is the maximum number of electrons that can be present in an s orbital?
How many p orbitals are there in each energy level?
What is the electron configuration for a neutral nitrogen atom?
- 1s² 2s² 2p²
- 1s² 2s² 3p³
- 1s² 2s¹ 3p³
Which element has an electron configuration of [He] 2s²2p⁴?