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In orbitals and shells. Orbitals are hard to describe because they are shaped by relativistic quantum mechanics and can only be visualized as probability clouds not as physical shapes. Shells are composed of sets of orbitals.

s orbital probability clouds are spherical.

p orbital probability clouds are egg shaped ellipsoids.

d orbital probability clouds are hour glass shaped with a donut around the middle unattached.

f orbital probability clouds are hour glass shaped with two distorted donuts around the middle unattached.

etc.

Shell 1 has a single s orbital.

Shell 2 has a single s orbital and 3 p orbitals.

Shell 3 has a single s orbital, 3 p orbitals, and 5 d orbitals.

Shell 4 has a single s orbital, 3 p orbitals, 5 d orbitals, and 7 f orbitals.

etc.

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14y ago

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