Chemistry Part 2 Test Review for Tuesday, Feb 2!
The Atom:
Label the parts proton, neutron, electron, nucleus, electron cloud on the atom diagram below.
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Bohr’s Model:
Maximum number of electrons in each energy level:
______ 1st level
______ 2nd level
______ 3rd level
______ 4th and higher
Which element is this Bohr model representing?
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Can you have a level not be “full” before going to the next?
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How many valence electrons does the element have?
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Is it stable or unstable?
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What does it mean for an element to be stable?
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What group and period is this element in?
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Draw Bohr Models for the following Elements:
Lithium:
Boron:
Silicon:
Using Periodic Table:
What is the atomic number of cobalt? _________
What is the atomic mass of iodine? ________
What are the columns called in the Periodic Table? _____________________
Where are most of the nonmetal elements?(circle one) Left of zigzag
Where are most of the metal elements?(circle one) Left of zigzag
Right of zigzag
Right of zigzag
On zigzag
On zigzag
What is the symbol for molybdenum? __________
In what group can you find strontium? _________
What do the elements Barium, Gold, Platinum, and Mercury have in common? ____________________
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What is the name of the scientist credited for developing the first periodic table? ___________________
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Determining Protons, Neutrons, and Electrons:
Which three numbers that deal with atoms are always the same number? (circle 3 below)
Atomic number
Atomic mass
# of protons
# of neutrons
# of electrons
What two numbers do you add together to get the atomic mass? (circle 2 below)
Atomic number
Atomic mass
# of protons
# of neutrons
# of electrons
Which two numbers do you subtract to find the number of neutrons? (circle 2 below)
Atomic number
Atomic mass
# of protons
# of neutrons
# of electrons
Electron (Lewis) Dot Diagrams:
Write the electron dot diagrams for the elements below.
Strontium
Selenium
Xenon
Potassium
What do the dots represent around each of the symbols in the Lewis Dot Diagram?
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