Noggin Knockers

1
Noggin Knockers
2
Topics

• Elements, Compounds, Mixtures
• States of Matter and their Particles
• Elements (Atomic , Mass, of protons, neutrons,
  electrons)
• Properties of Elements/Using the Periodic Table
• Bonding- Ionic vs. Covalent
• Ionic vs. Molecular Compounds (Properties)
• Chemical Reactions- Types, Balancing Equations,
  Conservation of Mass, Ratios, Describing
  Reactions

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Rules

• If you answer correctly, you win the point value
  of the question. If you answer incorrectly, you
  DO NOT lose any points. The team with the most
  points wins!

4
300

• Anything that has mass and takes up space is
  called ________. The study of matter and how it
  changes is called __________.
• The basic building block of matter that CANNOT
  be broken down chemically is a(n) ___________.
  All matter is made up of tiny particles called
  ________.
• Matter Chemistry Element Atoms

5
300

• How do the properties of a compound compare to
  the elements that it is made out of? Hint- Think
  about sodium chloride (NaCl) vs. sodium metal
  (Na) and chlorine gas (Cl2).
• They have different properties.

6
300

• Identify the following as an element, compound,
  or mixture pure salt (NaCl), oxygen (O2), sugar
  water?
• Pure salt compound
• Oxygen element
• Sugar Water Mixture

7
300

• Identify the following as a chemical or physical
  property fuel can burn, water freezes at 0oC,
  rocks can break.
• Fuel can burn Chemical
• Water Freezes Physical
• Rocks can break Physical

8
300

• Write the formula for calcium chloride. Ion
  chart is on page 23 of your book. What keeps the
  ions bonded together?
• CaCl2- The attraction of oppositely charged ions
  (Ca is and Cls are -)

9
300

• What type of bonding involves the sharing of
  electrons?
• Covalent Bonding

10
500

• How can you identify an unknown solid substance?
  Give 2 methods in your answer.
• Compare its density to known densities and do the
  same for melting point, boiling point,
  appearance, and chemical reactivity.

11
500

• Identify the following as a chemical or physical
  change and explain how you know for each one
  mixing baking soda and vinegar freezing water.
• Mixing baking soda and vinegar Chemical
  (bubbling/fizzing)
• Freezing water Physical (ice is still water)

12
500

• What would be an element with similar properties
  to Fluorine? Explain your answer. The Periodic
  Table is on page 14 15.
• Chlorine, Bromine, Iodine- all in the same group
  or column

13
500

• Determine the number of protons, neutrons, and
  electrons for the most common isotope of sodium
  (Na). The Periodic Table is on page 14 15.
• Protons 11 (same as Atomic )
• Electrons 11 (neutral so same as p)
• Neutrons 12 (22.99 rounds to 23 for the mass
  of the most common isotope and 23-11 of
  neutrons)

14
1000

• A change in energy where energy is given off is
  called a(n) ___________ change, while a change
  where energy is absorbed is called a(n)
  ___________ change. Explain how you expect the
  temperature to change for each one.
• Exothermic fireworks, hand warmers (temp. goes
  up)
• Endothermic cold packs, melting ice (temp. goes
  down)

15
1000

• Determine the density of a 22 g piece of metal
  with a volume of 2 mL. Would the object sink or
  float in water? D M/V
• D 22 g/2 mL 11 g/mL (about the density of
  lead)
• The object would sink.

16
1000

• If a chemical reaction occurs that gives off
  heat then _________ energy was changed into
  __________ energy. Whats the type of energy
  involves light?
• Chemical into thermal energy.
• Electromagnetic.

17
1000

• Explain how a gas has more pressure in a closed
  container when the container is heated. Think
  about what the gas particles are doing.
• Gas particles move all around faster while
  striking the walls of the container more.