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