Exam Study Guide
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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| study of composition and structure of materials and the changes that materials undergo best describes the science of | chemistry
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| technology is | the application of scientific knowledge to solve problems
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| a physical property may be investigated by | melting ice
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| chemical properties | include changes that alter the identity of a substance
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| based on its location in the periodic table you could infer that _______ is very unreactive | Ar
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| a vertical cloumn of blocks in the periodic table is | group
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| the elements that border the zigzag line in periodic table are | metalliods
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| physical means can be used to seperate | mixtures
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| group _____ in the periodic table contains only metals | 2
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| which element has properties most similar of those to sodium? | calcium
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| the state of matter in which a material has a definite volume but no definite shape is | liquid state
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| the most appropriate SI unit for measuring the length of an automobile is the | meter
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| poor precision in scientific measurements may arise from | both human erroe and the limitations of the measuring instrument
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| the SI unit for time is the | second
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| to calculate the density of an object | divide its mass by its volume
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| the symbol that represets the measured unit for volume is | mL
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| the unit m3 measures | volume
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| the symbol for the metric unit used to measure mass is | g
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| the standard SI units for length and mass are | meter and kilogram
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| the metric unit for length that is closest to the thickness of a dime is the | millimeter
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| what process always decreases the number of protons by an even number? | Alpha decay
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| what is the atomic number of tungsten | 74
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| how many significant digits are in 50.000005 | 2
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| this does not detect radiation | radio active tracer
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| phosphorus-33 contains | 18 neutrons
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| an atom of potassium has 19 protons and 20 neutrons, what is the mass number? | 19
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| as the mass number of isotopes of an element increases the number of protons | remains the same
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| reactions that affect the nucleus of an atom are called | nuclear reactions
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| how many half-lives are required for 3/4 of the nuclei of 1 isotope in a sample of decay? | 2
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| in a glass tube electrical current passes from the negative electrode called the _____ | cathode
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| a quantum of electromagnetic energy is called | photon
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| the emission of electrons from metals that have absorbed photons is called the | photoelectric effect
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| the distance between two successive peaks on a wave is its | wavelength
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| Max Plancsk proposed that a hot object radiated energy in small, specific amounts called | quanta
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| for electromagnetic radiation c (the speed of light) equals | frequency times wavelength
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| in SI, the frequency of electromagnetic radiation is measured in | hertz
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| one of the wave propertied of electromagnetic radiation, such as light,is | frequency
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| as it travels through space, electromagnetic radiation | exhibits wavelike behavior
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| how many groups are found on the periodic table? | 18
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| how many periods are found on the periodic table? | 7
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| A horizontal row of blocks in the periodic table is called | family
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| the electron configuration of aluminum, atomic number 13, is [NE} 3s2 3p1. Aluminum is in period | 13
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| the principle that states that the physical and chemical properties of the elemtns are periodic functions of their atomis numbers is | the periodic law
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| the person whose work led to a periodic table based on increasing atomic number was | Moseley
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| to which group do flourine and chlorine belong? | halogens
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| argon, krypton and xenon are | noble gases
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| the most useful source of general information about the elements for anyone associated with chemistry is a | periodic table
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| elements in a group or column in the periodic table can be expected to have similar | properties
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| to which group do lithium and potassium belong? | alkali metals
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| the energy required to remove an electron from an atom is the atom's | ionization energy
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| the electron configuration of nitrogen is 1s2 2s2 2p3. how many more electrons does nitrogen need to satisfy the octect rule? | 8
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| the substance whose lewis structure shows 3 covalent bonds is | NH3
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| the elements of the _______ group satisfy the octect rule without forming compounds | moble gas
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| an octect rule is equal to | 3
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| a compound that vaporizes readily at room temperature is most likely to be an | molecular compound
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| NOT a property of an ionic compound | low boiling point
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| how many double bonds are in the lewis structure for hydrogen flouride, HF? | none
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| if a material can be shaped or extended by physcal pressure, such as hammering, which property does the material have? | malleability
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| the electron-sea model of bonding represents | metallic bonding
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| atoms are _____ when they are combined | more stable
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