Chapter 12, section 1 Electrons and Chemical Bonding

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Chapter 12, section 1 Electrons and Chemical
Bonding
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Bell Work 12-1-14Plickers

• 1. When elements form mixtures, the elements
• keep their original properties.
• react to form a new substance with new
  properties.
• combine in a specific mass ratio.
• always change their physical state.

Write the question and answer!
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• Student Learning Objectives
• SPI 0807.9.1- Recognize that all matter consists
  of atoms.
• SPI 0807.9.4 - Differentiate between a mixture
  and a compound.
• SPI 0807.9.9 - Use the periodic table to
  determine the properties of an element.
• Describe chemical bonding.
• Identify the number of valence electrons in an
  atom.
• TOC
• 63. Ch 12, section 1 Notes
• 64. Valence Electrons
• HW Thursday- Element 11-20 Quiz
• Friday- Word Wall Crossword Puzzle due

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Element Quiz 2 on Thursday!

• You need to know the Element Name, Symbol, and
  Atomic for Elements 11-20.

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Electrons and Chemical Bonding

• Cool Link!

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• Chemical bonding is the joining of atoms to form
  new substances.
• An interaction that holds two atoms together is
  called a chemical bond. When chemical bonds form,
  electrons are shared or transferred.

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• The number of electrons in an atom can be
  determined from the atomic number of the element.
• Electrons in an atom are organized in energy
  levels 1st 2 2nd 8 3rd 18.

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• Valence electrons are the number of electrons on
  the outermost (last) energy level
• You can use the periodic table to determine the
  number of valence electrons for atoms of some
  elements

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• The number of electrons in the valence level of
  an atom determine whether an atom will form
  bonds.
• Atoms that have 8 electrons in their valence
  level do not usually form bonds. The outermost
  energy level is considered to be full if it
  contains 8 electrons.

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• An atom that has fewer than 8 valence electrons
  is more likely to form bonds than an atom that
  has 8 valence electrons. Atoms bond by gaining
  losing electrons or sharing electrons to have a
  filled outermost energy level.

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Move around the room!
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Show Time!

• 1. Which of the following atoms do not usually
  form bonds?
• Calcium
• Neon
• Hydrogen
• Oxygen
• 2. When bonding occurs, the joining of two atoms
  will form a _______ _____________.
• 3. How can an atom that has 5 valence electrons
  achieve a full set of valence electrons?
• 4. Identify the number of valence electrons in a
  barium atom.

Justify!
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Check!

• 1. Which of the following atoms do not usually
  form bonds?
• Calcium
• Neon
• Hydrogen
• Oxygen
• 2. When bonding occurs, the joining of two atoms
  will form a new substance.
• 3. How can an atom that has 5 valence electrons
  achieve a full set of valence electrons? They
  will share or gain 3 electrons.
• 4. Identify the number of valence electrons in a
  barium atom.
• A barium atom has 2 valence electrons.

Its a noble gas!
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Valence Electrons

• Color each Group
• Group 1 red
• Group 2 blue
• Group 13 yellow
• Group 14 brown
• Group 15 orange
• Group 16 violet
• Group 17 green
• Group 18 light blue

• Label the following groups
• Alkali Metals
• Alkaline Earth Metal
• Transition Metals
• Halogens
• Noble Gases

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Exit Ticket

• Look at the model. How many valence electrons
  are in the Nitrogen atom? Will Nitrogen
  atoms form bond? Explain.