Honors Chemistry Exam – Flashcards

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Flash Cards for the Fall Honors Chemistry Exam[image] ~By THIS GUY!
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(I actually typed these! crazy huh?) good luck everyone! tell me if anything is wrong with one of the cards!
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An example of an extensive property of matter is?
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Mass
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Which of the following are considered physical properties of a substance?
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All of the above
(Color and odor, melting and boiling points, malleability and hardness)
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Which state of matter has a definite volume and takes the shape of its container?
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Liquid
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Which of the following is a physical change?
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Evaporation
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Which of the following is true about homogeneous mixtures?
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They are known as solutions.
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Which of the following is a heterogeneous mixture?
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Oil and Vinegar
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Separating a solid from a liquid is called
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Distillation
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An example of a homogeneous mixture is?
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Stainless Steel
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Which of the following is true about compounds?
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they are substances
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A substance that can be separated into two or more substances only by chemical change is a?
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Compound
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What distinguishes a substance from a mixture?
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Mixtures can be separated physically, while compounds cannot.
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The first figure in a proper chemical symbol always is?
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Capitalized
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Which of the following represents a compound?
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Water
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What do chemical symbols and formulas represent respectively?
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elements and compounds
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What must be a change in a chemical reaction?
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There must be a change in chemical properties.
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Which of the following is true for all chemical reactions?
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the total mass of the reactants equals the total mass of the products.
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A chemical change occurs when a piece of wood...?
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Decays
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When an iron nail is grounded into powder, it's mass...?
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stays the same
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How many grams of liquid water produces when sixty grams of ice melt?
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sixty grams
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What is the result of adding 2.5 x 10 and 3.5 x 10?
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2.9 x 10(3) to the third power...
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How many significant figures are in the measurement 811.40 grams?
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5
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How many significant figures are in the measurement 40500 mgs?
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3
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Express the sum of 1111km and 222km using the correct number of significant digits?
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1333
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What is the measurement of 1042 L rounded off to 2 significant digits?
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1.0 x 10(3rd power)
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The chief advantage of the metric system over other systems of measurement is that it...?
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is in multiples of 10
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What is the SI Unit of mass?
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kilogram
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Which of the following mass units is the largest?
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1 dg
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If the temperature changes by 100 K, by how much would it change in degrees Celsius?
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100 degrees Celsius
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The quantity of 44 liters expressed in cubic meters is?
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0.044 m
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Density is found by dividing?
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mass by volume
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What is the volume of 45.6 g of silver if the density of silver is 10.5 g/mL?
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4.34 mL
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If the temperature of a piece of steel decreases, what happens to its density?
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The density increases
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As the density of a substance increases, the volume of a given mass of that substance...?
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decrease
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As the density of a substance increases, the volume of a given mass of that substance...?
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decrease
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The expression of 8504 km in scientific notation is
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8.504 x 10(3rd power) km
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The closeness of a measurement to its true value is a measure of its
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accuracy
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Which of the following measurements contains two significant figures? **-(A) 0.00400 L -(B) 0.00440 L -(C) 0.00404 L -(D) 0.00044 L
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(D)!
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Express the product of 2.2 mm and 4.00 mm using the correct number of significant digits.
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11 mm
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When multiplying and dividing measured quantities, the number of significant figures in the result should be equal to the number of significant figures in
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the lease percise measurement
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Which of the folloiwing columes is the smallest? -(A) one deciliter -(B) one liter -(C) one milliliter -(D) one microliter
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(D)
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Which temperature scale has no negative temperatures?
-(A) Joule
-(B) Celsuius
-(C) Fahernheit
-(D) Kelvin
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(D)
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The weight of an object
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depends on its location
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The smallest particle of an elements that retains the properties of that elements is a?
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atom
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Dalton hypothesized that atoms are indivisible and that all atoms of an elements are identical. It is now known that?
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atoms are divisible!
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Who conducted experiments to determine the quantity of charge carried by an electron?
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Milikan
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Which of the following is true concerning subatomic particles?
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The neutron was discovered by Chadwick in 1932.
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All atoms are? (referring the the charge)
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Neutral, with the number of protons equaling the number of electrons, which is equal to the number of neutrons.
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The nucleus of an atom is?
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central core and is composed of protons and neutrons
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The particles that are found in the nucleus of an atom are?
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protons and neutrons
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The atomic number of an element is the total number of which particles in the nucleus?
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protons
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An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are?[image]<- This guy fixed this card.

 

 

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76 protons and 76 electrons

[image]

And its his Birthday. Thanks Marlowe for pointing out the error and Happy Birthday!

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The sum of the protons and neutrons in an atom equals the?
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mass number
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What does the number 84 in the name krypton-84 represent?
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mass number
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All atoms of the same element have the same?
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number of protons
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All atoms of the same element have the same?
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number of protons
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Isotopes of the same element have different?
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Number of neutrons
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The mass number of an element is equal to?
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the total number of protons and neutrons in the nucleus.
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Using the periodic table, determine the number of neutrons in oxygen-16
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8
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How many protons, electrons, and neutrons does an atom with the atomic number 50 and mass number 125 contain?
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50 protons 50 electrons and 75 neutrons
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If E is the symbol for an element, which two of the following symbols represent isotopes of the same element?
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2/9 E
for all of you goobers out there
2/9 means the two is over the 9
doing subscripts would take too much time
and i have little of that
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Select the correct symbol for an atom of tritium
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H
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How is the number of neutrons in the nucleus of an atom calculated?
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Subtract the number of protons from the mass number
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How do the isotopes hydrogen 1 and 2 differ?
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H-2 has 1 neutrons and H-1 had none!
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Which of the following isotpes has the same number of neutrons as phosphorus-31?
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32/16 S
32 is over the 16
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What unit is used to measure weighted average atomic mass?
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amu
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Which of the following equals the weighted average atomic mass unit?
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the mass of helium-4 atom
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why do chemists use relative masses of atoms compared to a reference isotope rather than the actual masses of the atoms?
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the actual mass of an electron is very large compared to the actual mass of a proton.
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The atomic mass of an element is the?
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Total number of subatomic particles in its nucleus
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The atomic mass of the element depends on the?
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Mass and relative abundance of each isotope of that element.
(HOLY COW. THIS IS CARD 69 in 22 MINUTES. STILL GOING!)
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Which of the following was originally a tenet of Dalton's atomic theory. but had to be revised about a century ago?
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Atoms are tiny indivisible particles.
(haha the quiz that i took this question off of, i got a 2 outta 10! miserble isnt it? thank you karen for giving me the answers!)
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Why did J.J. Thomson reason that electrons must be a part of the atoms of all elements?
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Charge-to-mass ratio of electrons was the same, regardless of the gas used.
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Which of the following is true about subatomic particles?
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The mass of a neutron nearly equals the mass of a proton
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As a consequence of the discovery of the nucleus by Rutherford, which model of the atom is thought to be true?
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Electrons are distributed around the nucleus and occupy almost all the volume of the atom.
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If three electrons are available to fill three empty 2p atomic orbitals, how will the electrons be distributed in the three orbitals?
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one electron in each orbital.
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How many half-filled orbitals are in a bromine atom?
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ONE
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Stable electron configurations are likely to contain...?
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filled energy sublevels!
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Bohr's model could only explain the spectra of which types of atoms?
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single atoms with one electron
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How many unpaired electrons are in a sulfur atom? (atomic number 16)
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2!!!!
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What are qunta of light called?
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photons
(man i actually got a 3/10 on this quiz. must be a record. missing 3 out of 10 questions. gah i swear its like i TRIED to miss all of them. miserable!
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Which scientist developed the quantum mechanical model of the atom?
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Erwin Schrodinger
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How are the frequency and wavelength of light related?
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They are inversely proportional to each other.
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Emission of light from an atom occurs when an element___.
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Drops from a higher to a lower energy level.
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In the bohr model of the atom an electron in an orbit has a fixed ___.
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energy
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How does the energy of an electron change when the electron moves closer to the nucleus?
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Decrease
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The principle quantum number indicates what property of an electron?
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Energy level
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What is the shape of the 3p atomic orbital?
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Dumbell
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How many energy sublevels are in the second principle energy level?
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2
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What is the maximum number of S orbitals in any single enery level in an atom.
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seven
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What is the maximum number of electrons in the second principle energy level?
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8
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When an electron moves from a low to a higher energy level, the electron ___.
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absorbs a quantum of energy.
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The shape (not the size) of an electron cloud is determined by the electron ___.
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ENERGY SUBLEVEL!
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The letter P in the symbol 4p3 indicates the ___.
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Orbital Shape.
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