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Unit 2 Review Honors
Unit 2 Review Honors
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1
What is the electron configuration of Ca?
1s22s22p63s23p6
1s12s12p33s1
1s22s22p63s23p64s2
1s22s22p63s1
2
How could you illustrate an atom using the Bohr model while relating it to the hydrogen emission spectrum?
several energy levels, arrows pointing from the higher to the lower levels
2 energy levels w/ 2 arrows pointing in opposite directions
several energy levels, arrows pointing from the lower to the higher levels
several energy levels w/arrows pointing from the higher levels to nucleus
3
Heisenburg's Uncertainty Principle says
We can't find the energy or position of electrons
We can find either speed or position of electrons not both
We can't find the speed or position of electrons
We can find either energy or position of electrons not both
4
What are isotopes?
an element that has the same number of protons
None of the above
the same number of protons but different electrons
the same number of protons but different neutrons (and different mass)
5
how many TOTAL electrons can be held in the f orbitals?
14
6
10
18
6
Is this an image of nuclear fusion or nuclear fission?
fission
fusion
7
What does the Bohr's model state?
True
Electrons are randomly dispersed throughout an atom
Electrons have a dual-wave-particle nature
Electrons travel in a fix orbital
8
When
95
244
Am undergoes alpha decay it produces:
Pu
Cm
Np
Bk
9
How many neutrons are in the isotope Carbon-14?
6
14
8
12
10
Put these scientist into the correct order based on the atomic theory timeline.
Dalton, Thomson, Bohr, Rutherford & Schrodinger
Dalton, Schrodinger, Bohr, Rutherford & Thomson
Dalton, Thomson, Rutherford, Bohr & Schrodinger
Bohr, Dalton, Thomson, Rutherford & Schrodinger
11
What stops gamma radiation?
Wood
High hydrogen content stuff
Something dense like lead or concrete
Clothing, paper and unbroken skin
12
The principal quantum number, n, represents
The number of electrons in an atom
The number of protons in an atom
The energy level
The energy sublevel
13
At the beginning of the periodic table the neutron to proton ratio for stable atoms is about
1:1
2:1
3:1
1.5:1
14
Which of these substances was NOT one of Aristotle's 4 elements that were thought to be the root of all matter?
earth
gold
fire
wind
15
Is this an image of nuclear fusion or nuclear fission?
fusion
fission
16
An oxygen atom _________________ to form an oxygen ion.
gain 2 protons
lose 1 proton
gain 2 neutrons
gain 2 electrons
17
Which of the following is part of John Dalton's atomic theory?
All elements are composed of atoms.
A compound contains atoms of more than one element.
Atoms contain subatomic particles.
All atoms of the same element have the same mass.
18
John Dalton's atomic theory contained four postulates about atoms. Which of his predictions is still considered
correct
?
All the atoms of a particular element have the same mass.
Atoms of different elements can combine in simple, whole-number ratios
All atoms of one element are identical.
No atom can be split into simpler parts.
19
A particle contains 12 protons and 11 electrons. It is:
a Sodium ion
a Magnesium atom
a Sodium atom
A Magnesium ion
20
Find the average atomic mass of Chlorine.
40.51 amu
33.78 amu
34.48 amu
35.45 amu
21
What does Pauli's Exclusion Principle Indicate?
No two electrons can have the same set of quantum numbers
Electrons can enter an excited state
Electrons repel each other
Fully filled orbitals are more stable then partially filled
22
Who was the first person to use the term
atom
?
Mary J. Blige
Democritus
Hohn Dalton
Pickle Rick
23
Photons are
Another word for photosynthesis
Photos in plants memory base
Sunshine
Packets of energy
24
Uranium-238 undergoes alpha decay. Therefore, it will
Change into a different element altogether.
Stay the same.
Remain stable.
Emit neutral particles and no energy.
25
If an atom loses a proton, what happens?
Its mass is lowered, and it becomes a different element.
Its mass is lowered, but it is still the same element.
Its mass stays the same, and it becomes a different element.
Its mass stays the same, and it is still the same element.
26
What is the mass and charge of a neutron?
Mass = 0.0005, Charge = 2
Mass = 1, Charge = +1
Mass = 0.0005, Charge = -1
Mass = 1, Charge = 0
27
An isotope has a half-life of 2 days. How much of 40 g is left after 4 days?
5 g
20 g
10 g
40 g
28
John Dalton developed an atomic theory showing that
each element has its own kind of atoms
atoms exist within the periodic table
all atoms are basically alike
29
How do we find the atomic mass?
Electrons + Protons
Protons - Electrons
Protons + Neutrons
Protons - Mass
30
Is the image an example of Hund's Rule or Pauli's exclusion principle?
Hund's Rule
Pauli's Exclusion Principle
31
What ideas did the Plum Pudding model propose?
The Atom take the shape of a square and does not contain any charge.
Atoms are spherical with positive and negative charges (e) embedded in it.
The atom contains a neutral charge and has the ability to combust
That atoms are delicious
