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Electrons exist in the electron cloud that surrounds the nucleus of an atom. This cloud is made up of the various orbitals that hold the electrons. Orbitals are regions of space in which the probability of finding an electron is the highest. The electrons orbit the nucleus in these orbitals and can move from one orbital to another as they gain or lose energy.

  • 1s Orbital: This orbital is closest to the nucleus and can hold up to two electrons.
  • 2s Orbital: This orbital is farther away from the nucleus and can hold up to two electrons.
  • 2p Orbitals: These orbitals are even farther away from the nucleus and can hold up to six electrons.
  • 3s Orbital: This orbital is farthest away from the nucleus and can hold up to two electrons.
  • 3p Orbitals: These orbitals are even farther away from the nucleus and can hold up to six electrons.
  • 3d Orbitals: These orbitals are the farthest away from the nucleus and can hold up to ten electrons.

These orbitals are filled in a specific order with the 1s orbital being filled first then the 2s 2p 3s 3p and finally the 3d orbitals. The electrons in the outermost orbitals are called valence electrons and are responsible for the chemical properties of the atom.

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Kip Strosin

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2y ago

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