Magnesium has three common isotopes. Based on its average atomic mass, which is the most common?
How are isotopes of the same element similar?
What should the electron configuration for neon (Ne) end with? Is it going to be a stable atom or a reactive atom?
Which scientist is credited with discovering the charge of an electron?
Why did Democritus disagree with Aristotle?
A tenth of a mole of pennies contains how many pennies?
When an electron moves from an excited state to a ground state, it will _____.
When writing electron configurations, electrons are represented in their lowest possible energy state, called their _____.
A piece of aluminum foil has a mass of 27 grams. About how many atoms does this contain?
Who first coined the term
atom, meaning indivisible?
What is the largest principal quantum number that a calcium electron can have?
Which letter orbital corresponds to l = 2?
Which of the following has a positive charge and a mass of one?
Particles that are found in the atomic nucleus are:
How many neutrons does the most common isotope of hydrogen have?
A computer chip contains 1.20 x 10^23 atoms of silicon. What is its mass?
The mass number indicates:
What did Rutherford discover in his gold foil experiment?
The average atomic mass or atomic weight found on the periodic table is _____.
What does the atomic number represent?
Which quantum number indicates the position of the orbital?
A piece of pencil graphite (made of carbon atoms) has a mass of 0.12 grams. How many moles of carbon atoms are in the lead?
The Bohr model of the atom:
Which element has a mass number of 12 and contains 6 neutrons?
Which of the following was the instrument used for the discovery of the electron?
If only one type of atom makes up a substance, what can you call this substance?
X and Y are elements that are isotopes to each other. Which of the following is true about X and Y?
What is the maximum number of electrons that can be found in a 5p cluster (or orbital) of a single atom?
Which of the following sets of quantum numbers CAN exist?
n = 2, l = 2, ml = 0, s = +1/2
n = 0, l = -1, ml = 0, s = +1/2
n = 1, l = 0, ml = 1, s = +1/2
n = 2, l = 1, ml = -2, s = +1/2
n = 2, l = 1, ml = 0, s = +1/2
Which block is manganese (Mn) located in?
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