Quantum Numbers: Size of An Atom

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Sean Sugai 4E
Posts: 56
Joined: Wed Sep 11, 2019 12:17 am

Quantum Numbers: Size of An Atom

Postby Sean Sugai 4E » Sun Oct 20, 2019 10:23 pm

The state of an electron is defined by n, l, Ml, and Ms. Why does the size of an atom increase as n increases?

zoedfinch1K
Posts: 57
Joined: Thu Jul 25, 2019 12:16 am

Re: Quantum Numbers: Size of An Atom

Postby zoedfinch1K » Sun Oct 20, 2019 10:27 pm

If you think about what n, represents, it is the shell of an atom. When the shell is increasing, there are now a great number of electrons (or places where electrons could be). In a neutral atom, the number of protons and electrons are the same so this increase in electrons correlates to an increase in protons, therefore making the nucleus of the atom larger. With a larger nucleus and electron "cloud", the atom will be bigger.

KSong_1J
Posts: 101
Joined: Thu Jul 11, 2019 12:17 am

Re: Quantum Numbers: Size of An Atom

Postby KSong_1J » Sun Oct 20, 2019 10:32 pm

n is related to the size and energy of the orbital; as n (aka the energy level) increases, the mean distance of an electron from the nucleus increases, which means the radius of the atom gets larger.

John Arambulo 1I
Posts: 58
Joined: Sat Jul 20, 2019 12:15 am

Re: Quantum Numbers: Size of An Atom

Postby John Arambulo 1I » Sun Oct 20, 2019 10:33 pm

The reduced electrostatic attraction due to the distance from the nucleus, electron-electron repulsions, and shielding from the inner energy levels and subshells results in an effective nuclear charge, and the result is an increase in the size of the atom.

britthanul234
Posts: 51
Joined: Wed Sep 18, 2019 12:21 am

Re: Quantum Numbers: Size of An Atom

Postby britthanul234 » Mon Oct 21, 2019 5:32 pm

N is the size and energy of the orbital. As n increases, the distance from nucleus increases, so the size (radius) increases as well.


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