"Atoms and Valence Electrons Reference Sheet"

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Atoms and Valence Electrons Reference Sheet
Valence Electrons: those electrons that have the highest energy level and are held most loosely.
Electron Dot Diagram: a diagram that includes the symbol for the element surrounded by dots.
Each dot stands for one valence electron.
Chemical Bond: the force of attraction that holds two atoms together as a result of the
rearrangement of electrons between them.
How does the Periodic Table Work?
Read the table from left to right across the period
As the atomic number increase, the number of electrons also increases
A given period ends when the number of valence electrons reaches eight (exception:
Hydrogen & Helium)
The elements within a group (a vertical row) all have the same number of valence electrons
and similar properties
Electron Dot Diagram Examples:
Kr
K
Atoms and Valence Electrons Reference Sheet
Valence Electrons: those electrons that have the highest energy level and are held most loosely.
Electron Dot Diagram: a diagram that includes the symbol for the element surrounded by dots.
Each dot stands for one valence electron.
Chemical Bond: the force of attraction that holds two atoms together as a result of the
rearrangement of electrons between them.
How does the Periodic Table Work?
Read the table from left to right across the period
As the atomic number increase, the number of electrons also increases
A given period ends when the number of valence electrons reaches eight (exception:
Hydrogen & Helium)
The elements within a group (a vertical row) all have the same number of valence electrons
and similar properties
Electron Dot Diagram Examples:
Kr
K