Semester Exam
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Cemical properties | include changes that alter the identity of a substance
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| The study of substances containing carbon is | organic chemisrty
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| The particles in a solid are | packed closely together
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| Group __ in the periodic table contains only metals. | 2
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| Physical means can be used to separate | mixtures
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| An example of an extensive physical property is | mass
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| Which element has properties most similar to those of sodium? | calcium
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| What is an intensive physical property? | color
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| WHat is not a property of metals? | unreactivity
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| A vertical column of blocks in the periodic table is called a | group
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| The symbol for the metric unit used to measure mass is | grams
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| The symbol that represents the measured unit for volume is | mL
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| The SI standard units fir length and mass are | meter and kilogram
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| The SI base unit for time is the | second
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| A change in the force of Earth's gravity on an object will affect its | weight
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| The product of 13cm* 5.7 cm is correctly reported as | 74 cm(2)
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| The graph of an inverse proportion is a | hyperbola
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| The graph of a direct proportion is a | straight line
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| The number of sig. digits in the measurment 210cm is | 2
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| How many minutes are in one week? | 10,080
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| NIckel-60 has | 32 neutrons
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| Sulphur-34 contains | 18 neutrons
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| Who called the atom an atom | Democritus
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| Chlorine-35. It has | 17 protons, 17 electrons, and 18 neutrons
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| what does the 218 in polonium-218 represent? | mass number
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| Experiments with cathode rays led to the discovery of the | electron
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| How many sig digs are in 50.00000s | 7
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| What is the atomic number of Tungsten | 74
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| How many sig digs are in .0050m | 4
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| What scientist discovered electrons? | J.J Thompson
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| In SI, the frequency of electromagnetic radiation is measured in | hertz
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| As it travels through space, electromagnetic radiation | exhibits wavelike behavior
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| The distance between 2 successive peaks on a wave is its | wavelength
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| A quantum of electromagnetic energy is called a | photon
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| The wave model of light did not explain | the photoelectric effect
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| The number of orbitals for d sublevel is | 5
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| For the f sublevel, the number of orbitals is | 7
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| The main energy level that can only hold 2 electrons is the | first
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| Which group is noble gases | 18
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| What is th speed of light? | 3.00 * 10(8)m/s
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| The number of valence electrons in Group 17 is | 7
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| The number of valence electrons in group 2 is | 2
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| The elements in group 1 are known as | alkali metals
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| A positive ion is known as | cation
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| A negative ion is known as | anion
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| Argon, krypton, and xenon are | noble gases
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| A horizontal row of blocks in the periodic table is called a | period
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| Which group do fluorine and chlorine belong | halogens
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| The elements that border the zigzag line in the perodic table are | metalloids
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| Valence electrons are in the | highest energy level
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| Most chemical bonds are | partly ionic and partly covalent
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| AN octet is equal to | 8
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| A covalent bond results when __ are shared | electrons
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| Atoms are __ when combined | more stable
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| If 2 covalently bonded atoms are identical, the bond is | nonpolar covalent
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| When atoms share electrons, the electrical attraction of an atom for the electrons is called the atom's | electronegativity
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| THe elctrons involved in the formation of a chemical bond are called | valence electron
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| If the atoms that share electrons have an unequal attraction for the electrons, the bond is called | polar
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| B is not an example of what | molecular formula
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| The elements of the __ group satisfy the octet rule without forming compounds | noble gases
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