The Atom
The Periodic Table
Chemical Bonding
Intermolecular Forces
Chemical Reactions
100
Schrodinger's model of the atom which is the most currently accepted model is referred to as the...
What is "Quantum Mechanical Model"
100
The periods (rows) on the period table organize the elements according to this...
What is "the number of energy levels"
100
Hydrogen bonding requires that hydrogen is directly bonded to one of these 3 elements...
What is "Fluorine, Oxygen and Nitrogen"
100
A hydrocarbon organic molecule will have a low boiling point when it has a (short/long) carbon chain and (few/many) branches
What is "short and many"
100
an element that has become oxidized has (lost/gained) electrons and therefore has become more (positive/negative)
What is "lost electrons and become more positive" ~Reasoning: OIL RIG, oxidation is losing electrons and reduction is gaining electrons
200
Rutherford determined that atoms have a dense, positively charged central nucleus and yet are mostly empty space because of this break-through experiment...
What is "the gold foil experiment"
200
How many unshared pairs of electrons does sulfur (S) have in its lowest energy state/ground state? (Hint: draw an orbital diagram"
What is "2"
200
The nomenclature (name) of CO...
What is "carbon monoxide" ~ Reasoning: the pre-fix mono is only used when there is one atom of the second element but not when there is one atom of the first
200
These two molecular geometrical shapes will always be polar due to the fact that they have one or two lone pairs on their central atom (making them asymmetrical)...
What is "bent and trigonal pyramidal"
200
A chemical reaction in which there is just one compound on the reactant side tells you that the reaction is of this type...
What is "decomposition reaction" ~Reasoning: the only possible reaction outcome when there is just one compound on the reaction side is for the compound to break apart
300
This is the important difference in the lines of an emission spectrum as opposed to the lines in an absorption spectrum
What is "the lines in an emission spectrum occur due to electrons transitioning to lower energy levels by emitting energy in the form of light whereas the lines in an absorption spectrum occur due to electrons transitioning to higher energy levels"
300
The elements Rubidium and Strontium have similar chemical properties because...
What is "they have the same number of energy levels" or "their valence electrons are in the same energy level (n=5)"
300
This type of bond conducts electricity when it's a solid...
What is "metallic bonding"
300
Molecules with (weak/strong) intermolecular forces typically have high boiling points since it requires more energy to break apart the molecules in order to evaporate them
What is "strong" ~ Example: polar covalent molecules or ionic compounds
300
A combustion reaction is a special type of reaction because it always contains these reactants... and these products...
What is "a hydrocarbon reacting with oxygen gas to yield carbon dioxide and water"
400
Schrodinger's model of the atom contradicted Bohr's model of the atom because he disagreed that electrons travel in definite orbits and instead proposed...
What is "electrons travel in electron clouds or probability regions" ~Reasoning: probability regions explains that we can not precisely locate the whereabouts of an electron at any one point in time but we can predict where it is most likely/probably located
400
Ionizaton energy and electronegativity are both the same and opposites of one another because...
What is "ionization energy and electronegativity have the SAME periodic trends (increases going up the groups and increases from left to right on the periods) but they have OPPOSITE definitions (IE = the amount of energy it takes for the first valence electron to escape the atom, EN = the ability of the atom to attract electrons from other atoms)
400
In order for a molecule to be bonded covalently (and only covalently) it must follow these rules...
What is "it must consist of non-metals bonded to non-metals AND not contain any polyatomic ions" ~ Reasoning: the key word in polyatomic ion is ION... anything with a polyatomic ion is considered an IONic compound since the polyatomic is associated with a charge
400
When a substance is "very volatile" it means that...
What is "the substance evaporates very easily due to the fact that it has weak intermolecular forces so it doesn't take much for the molecules break apart"
400
In a single replacement or double replacement reaction it is important to remember that the metal cation on the reactant side will never pair up with a ____________ on the product side, likewise, the non-metal anion will never pair up with a ____________ on the product side.
What is "metal cations will not pair up with other metal cations... and non-metal anions will not pair up with other non-metal anions"
500
According to Bohr's emission spectra... electron A which transitions from n=4 to n=2 differs from electron B which transitions from n=3 to n=2 because electron A emits (less/more) energy and therefore has a (lower/higher) frequency and a (shorter/longer) wavelength
What is "more energy, higher frequency, shorter wavelength" ~ Reasoning: you need to understand the relationships between the three variables to get this problem correct... energy and frequency are directly proportional while frequency and wavelength are indirectly proportional
500
Between the Potassium (K) cation and the Bromine (Br) anion, this is the ion that is the largest..
What is "Bromine" ~ Reasoning: Br-1 has the same number of electrons as the nobel gas Krypton while K+1 has the same number of electrons as the nobel gas Argon meaning Br-1 has one more energy level than K+1 making it the larger of the two ions
500
The water molecule is special because it exhibits these unusual characteristics...
What is "water is more dense as a liquid than it is as a solid (ice floats on water), and water expands as it freezes (if water gets into a cracked windshield and then freezes it can spread apart the crack and shatter the windshield completely)
500
What is the type of substance that will dissolve in oil, but not water?
What is "non-polar substance" ~ Reasoning: the like-dissolves-like rule... non-polar solutes dissolve in non-polar solvents and polar solutes dissolve in polar solvents
500
A chemical reaction that is NOT a redox reaction means that its elements...
What is "do not gain or lose electrons when going from the reactant side to the product side" ~Reasoning: if the reaction is not redox it means that nothing has been oxidized or reduced
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