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there are 4 sublevels
there 7 energy levels
sublevel 4 is the last sublevel so energy levels 4-7 have a sublevel of 4. Kamari

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For the Lewis Dot Structure you write the elements symbol and then the number of valence electrons equally as dots around the sides of the symbol of the element.
For Example:

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Simple valence electron configuration for group 1,2, 13~18

Based on the last number
of the columns one can easily know the valence electron of the elements belonging to the column.
Ex. 1=1 13=3 15=5

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electron configuration-An electron configuration is the arrangement of electron of an atom or a molecule in an atomic or molecular orbital.

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The number of balence electrons are seen as dots around the elements symbol but you have to distribute the dots ons side at a time

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Atomic Radius & Ionic Radius:

General Trend:

-  Increases as you go from right to left across a period
-  Increases as you go from top to bottom within a group

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Mr. Hoos

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Sublevel
# of Orbitals
# of electrons

S- one 2e-

P- three 6e-

D- five 10e-

F- seven 14e-

- Prestwich

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Electronegativity- defined as the relative ability of atoms to attract electrons in a chemical bond.

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Ionization energy- energy required to remove an electron from atom to atom, how strongly it holds onto its valence electrons, the stronger the hold on the valence e-'s the greater the ionization energy

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electronegativity- the relative ability of atoms to attract electrons in chemical bond

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Oh Noah
Valence electron configuration

From group 1, 2, 13- 18
Based on the last number
1=1 13 =

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Electrons located in the highest principal energy level are called Valence Electrons

- Will Prestwich

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Transition metals are groups 3-12 by Gavin White

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Transition metals are groups 3-12 by Gavin White

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The Quantum mechanical model of an atom limits an electrons energy to certain values.

Niko Georgelis

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Actinide series- F block

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Ryan Kowalczyk

The Aufbau principle states that, hypothetically, electrons orbiting one or more atoms fill the lowest available energy levels before filling higher levels (e.g., 1s before 2s).

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States that it is fundamentally impossible to know precisely bot the velocity and position of a particle at the same time.
-Graham Kotchick

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Orbital diagrams
ex.

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they are in groups 1,2 and 13-18 and possess a wide range of chemical and physical properties

Luke Sheridan

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Hund's Rule - when electrons enter orbitals of equal energy, each orbital must have one electron before doubling up

Example:

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Orbits can hold only a maximum of 2 electrons, also no atoms can have the same Quantom Number

-Sebastian Cobb

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noble gas configurations -
Shorthand way to write Electron Configurations using the noble gases on the periodic table