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