Chemical Bonding

Chemical Bonding

By Kelly Harrison

​Why do atoms form chemical bonds?

Subject | Subject

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• When atoms come together, they can react and form chemical bonds.

• ​Chemical bonds are the force of attraction that exists between atoms.

• ​The number of valence electrons that an atom has will determine if the atom will bond with atoms of other elements.

Multiple Choice

​What determines if an atom will bond with atoms of other elements?

• atomic number

• mass number

• number of valence electrons

• isotope notation

Multiple Choice

Review:

Using your periodic table, how many valence electrons does carbon have?

• 1

• 2

• 3

• 4

Multiple Choice

Review:

Using your periodic table, how many valence electrons does Krypton have?

• 5

• 6

• 7

• 8

Multiple Choice

Review:

Using your periodic table, how many valence electrons does Helium have? (Hint: remember He does not follow the normal rule.)

• 2

• 4

• 6

• 8

Chemical Bonding

• An atom is stable when its outermost energy level is fully occupied with 8 valence electrons.

• The octet rule is described below...

  Atoms will lose, gain or share electrons to achieve 8 valence electrons. (Helium is an acception to the rule. Helium is stable with 2 valence electrons.)

• Most elements in group 18 (Noble Gases) have 8 valence electrons. ​

  Therefore, these elements have stable atomic structures and will not form chemical bonds with other atoms.

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Subject | Subject

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Multiple Choice

How many valence electrons make most atoms very stable? (Helium is an exception to this rule. It has 2 valence electrons.)

• 2

• 4

• 6

• 8

Multiple Choice

What is the name of the rule that describes an atom having a stable configuration?

• Rule of Nines

• Octet Rule

• Quartet Rule

• Law of Conservatoin of Matter