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Understanding Atomic Structure
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What equation is lambda = h/mv?
 
de Broglie equation
 
Davisson-Germer equation
 
Planck equation
 
Einstein equation
The Heisenberg uncertainty principle is concerned with what two properties?
 
momentum and position
 
mass and velocity
 
position and velocity
 
momentum and mass
What is an orbital?
 
The location of an electron
 
The rings around an atom
 
The space between electrons
 
The charge of an atom
Based on Avogadro's number, which of the following is FALSE? (For reference: the molecular mass of helium is 4 g, the molecular mass of carbon is 12 g.)
 
One mole of carbon atoms has a mass of 6 grams.
 
One mole of helium atoms has a mass of 4 grams.
 
The mole is the number of amu in a gram.
 
A mole is 6.02 × 1023.
The mass number of an atom indicates:
 
the total number of protons and neutrons.
 
the number of neutrons.
 
the number of protons.
 
the total number of protons and electrons.
What is the largest principal quantum number that a calcium electron can have?
 
n = 4
 
n = 1
 
n = 0
 
n = 2
Which of the rules discussed in this lesson relates to the spin of electron in an orbital?
 
Pauli exclusion principle
 
Aufbau principle
 
Hund's rule
 
None of these discussed spin
How many electrons can fit into the p subshell?
 
6
 
2
 
10
 
5
Which of the following has a positive charge and a mass of one amu?
 
Protons
 
Neutrons
 
Chemical bonds
 
Electrons
Magnesium has three common isotopes. Based on its average atomic mass, which is the most common?
 
Magnesium-24
 
Magnesium-12
 
Magnesium-26
 
Magnesium-25
How are isotopes of the same element similar?
 
They have the same number of protons.
 
They have the same number of neutrons.
 
They have the same mass.
 
They are equally abundant in nature.
Which block is manganese (Mn) located in?
 
d-block
 
s-block
 
p-block
 
f-block
What is the main point of the de Broglie equation?
 
matter has wave-like properties
 
Einstein's theory of relativity was incorrect
 
matter only behaves like a particle
 
the position of light cannot be precisely determined
What is the term for the number of peaks that pass through a fixed spot during a given time interval?
 
frequency
 
wavespeed
 
wavelength
 
Planck's constant
What is the name of the constant in the Heisenberg Uncertainty Principle equation?
 
Planck's
 
Einstein's
 
Heisenberg's
 
de Broglie
What does the Pauli Exclusion Principle deal with?
 
electron spin
 
electron speed
 
electron charge
 
none of these are correct
Which rule states that electrons will go into empty orbitals of the same energy before entering into an orbital with an electron present?
 
Hund's Rule
 
Hand's Rule
 
Aufbau Principle
 
Pauli Exclusion Principle
Which of the following is an example of when an electron absorbs energy?
 
When it goes from the second energy level to the fourth.
 
When it maintains constant energy and doesn't change .
 
When an electron releases a photon.
 
When it goes from the fourth energy level to the first.
Which of the following was the instrument used for the discovery of the electron?
 
Cathode ray tube
 
Gold foil experiment
 
Alpha particle emitter
 
Oil drop apparatus
A computer chip contains 1.20 x 10^23 atoms of silicon. What is its mass? (The molecular mass of silicon is 28 g/mol.)
 
5.6 grams
 
6.02 x 10^23 grams
 
14 grams
 
2 grams
A piece of aluminum foil has a mass of 27 grams. About how many atoms does this contain? (Aluminum has a molecular mass of 27 g/mol.)
 
6.02 x 10^23 atoms
 
1.20 x 10^24 atoms
 
3.01 x 10^23 atoms
 
27 atoms
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