Quantum Model of Atom Energy levels (shells) are divided into sublevels (subshells). Electrons are found in orbitals in these sublevels.

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Presentation transcript:

Quantum Model of Atom

Energy levels (shells) are divided into sublevels (subshells). Electrons are found in orbitals in these sublevels.

ORBITALS - SUBLEVELS

Orbital – the three dimensional area around the nucleus where a particular electron can be found. Each orbital can hold two electrons

Principle Quantum Number TELLS YOU WHAT SHELL AN ORBITAL IS IN n=6 n=5 n=4 n=3 Energy n=2 n = 1 V.Montgomery & R.Smith

Each shell (level) has sublevels. Different types of sublevels: s,p,d,f

s orbital One s orbital per shell

p orbitals Three p orbitals per shell starting with 2nd shell.

p orbitals first appear in the 2nd shell

Five d orbitals per shell starting with 3rd shell

d orbitals 1st appear in the 3rd shell

Aufbau Principle – electrons fill the lowest energy orbitals first.

Sublevel filling order:

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