Unit 4 Review: Chapter 45 Atomic Structure and Electron Configurations

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Unit 4 Review Chapter 4-5Atomic Structure and
Electron Configurations

• Mrs. Jacks

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1.

• Q. Who was the first scientist to hypothesize
  that all matter was made of indestructable
  particles called atomos (atoms)?
• A. Democritus

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2.

• Q. Which scientist discovered that the nucleus is
  a dense region that has a positive charge?
• A. Rutherford

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3.

• Q. Which scientist constructed the cathode ray
  tube?
• A. Crookes

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4.

• Q. Which scientist came up with the following
  idea
• Atoms of different elements can phyically mix
  together or can chemically combine in simple,
  whole-number ratios to form compounds
• A. Dalton

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5.

• Q. True or False?
• Atoms of one element are never changed into
  atoms of another element as a result of chemical
  reaction
• True
• Who came up with this idea?
• A. Dalton

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6.

• Q. Which scientist used the cathode ray tube to
  discover a sub-atomic particle?
• Thomson
• Q. Which subatomic particle did he discover?
• A. Electron

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7.

• Q. What did Millikan contribute to the
  understanding of atomic structure?
• A. Discovered the charge and mass of electrons

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8.

• Q. Which subatomic particle has a mass that is
  much less than the other two sub-atomic
  particles?
• A. Electron

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9.

• Q. Who discovered the neutron?
• A. Chadwick

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10.

• What charge does an electron have?
• Negative
• Q. What charge does a neutron have?
• None
• Q. What charge does a proton have?
• A. Positive

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11.

• Q. Which sub-atomic particle is NOT found in the
  nucleus?
• A. electron

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12.

• Q. The majority of the size of an atom is
  composed of the nucleus
• A. False, it is mostly empty space.

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13.

• Q. Complete this statement
• The atomic number of an atom describes how many
• A. Protons it has

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14.

• Q. What constitutes the mass number of an atom?
• A. Its protons and neutrons combined

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15.

• Q. What is the relative mass number of
  Aluminum-30?
• 30 amu
• Q. What is the atomic number of Aluminum-30?
• 13

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16.

• Q. So, how many neutrons are in an atom of Al-30?
• A. 17

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17.

• Q. If an atom has gained an electron it is no
  longer called an atom but will be called a(n)
  _________
• Ion
• Q. Will this type of atom have a positive,
  negative, or neutral charge?
• A. Negative

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18.

• Q. Two atoms, such as neon-20 and neon-21 have
  different masses due to different numbers of
  ___________
• Neutrons
• Q. These atoms are called ____________ of one
  another
• A. Isotopes

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19.

• If the neon in a light consists of 70 of Neon-20
  and 30 Neon-21, what is the relative mass of the
  sample?
• (.7)x20 (.3) x 21 ____

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20.

• Q. What element does an amu (atomic mass unit)
  use as the standard?
• Carbon
• Q. One amu is equal to ______ the mass of one of
  these atoms.
• A. 1/12

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21.

• Q. True or False?
• A period is a horizontal row on the periodic
  table
• A. True

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Chapter 522.

• Q. Which model confined electrons to separate
  energy levels (but not into sub-orbitals)
• A. The Bohr Model

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23.

• Q. What is the amount of energy required to move
  an electron up one energy level?
• A. Quantum

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24.

• Q. True or False?
• An electron that gains energy can move to a
  higher energy level.
• True
• Q. An electron that has done this is called what?
• A. Excited

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25.

• Q. When an electron returns to its original
  energy level, it is considered to be in its
  _______________ state
• A. ground

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26.

• Q. What is the shape of an s orbital?
• Sphere
• Q. What is the shape of a p orbital?
• 8-shaped
• Q. What is the shape of a d orbital?
• A. 4-leaf clover shaped

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27.

• Q. Write the electron configuration for Carbon
• 1s2 2s2 2p2

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28.

• Q. Write the electron configuration for Na
• And then draw the electron boxes for
• each orbital.
• 1s2 2s2 2p6 3s1

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29.

• Didnt have time to make up question for section
  5.3.
• Lets make some up now!