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