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62 Cards in this Set
- Front
- Back
A neutral solution has a pH of?
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7
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What piece of equipment will measure 75 mL of sulphuric acid with the greatest precision.
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100 mL graduated cylinder
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What should you do if you find an unlabled chemical bottle in the lab?
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Tell the teacher so it can be disposed properly.
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Why do atoms of sodium and chlorine attract each other in a salt chrystal?
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Sodium has a positive charge and chlorine has a negative charge.
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What type of bond does a compound of Barium and Sulfur (Barium Sulfide) have?
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Ionic
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What kind of reaction happens when wood burns and releases heat into the environment?
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Exothyrmic
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Name the compound with the formula N2O5? (the 2 and 5 are subscripts)
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Dinitrogen pentoxide
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Where are valence electrons located?
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The outer shell
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Determine the number of atoms in the following compound: Al(OH)3. (3 is a subscript)
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7
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Atoms are electrically neutral because they have:
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Equal numbers of protons and electrons
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What kind of change is a glue gun melting a glue stick?
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Physical change
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What kind of change is a leaf changing color?
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Chemical Change
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What is the base unit for mass?
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Kilogram
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What kind of mixture is air?
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Homogeneous
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Chlorine has atomic number 17 and mass number 35. It has
___Protons____ electrons ____ neutrons |
17 protons, 17 electrons, 18 neutrons
(protons = electrons = atomic number) Neutrons = mass # - atomic # |
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good electrical conductor and heat conductor
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metal
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1.06L of water = _______mL of water
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1.06 L of water = 1060 mL water
(to move from L to mL, move the decimal to the right three spaces) |
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A substance, made of two or more atoms that are chemically bonded, that can be broken down into simpler, stable substances:
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Compound
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Lab equipment, mostly used to hold liquids
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Beaker
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The relationship between the mass m of a material, its volume V, and its density D is:
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D = m/V
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What is the metric unit that is closest to the diameter of a pencil?
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centimeter
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If a mixture is uniform in composition, it is said to be:
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homogeneous
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What are the Noble Gasses in Group 18 best known?
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unreactive
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Elements in a group or column in the periodic table can be expected to have similar:
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properties
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Group 17
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Halogens
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A blend of any two or more kinds of matter, as long as each maintains its own unique properties:
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Mixture
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Vertical columns on the periodic table
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groups
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What does the symbol mm represent?
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Millimeter
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Measure of the quantity of matter
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mass
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Properties of Ionic Compounds:
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brittleness
conducts electricity hardness |
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Examples of units:
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gram
kilometer teaspoon kilogram |
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Examples of physical change:
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cutting
grinding boiling melting |
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SI base unit for length:
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Meter
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All atoms of the same element have the same:
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atomic number
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Why do Noble gasses not typically form compounds?
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Noble gasses do not typically combine with other elements, due to their full outer energy level, which has eight electrons.
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A non-metal is typically:
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brittle
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Examples of chemical change:
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igniting
rusting burning |
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What is the formula for the compound formed by calcium ions, Ca^2+, and chloride ions, Cl^-?
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CaCl2 (the 2 is a subscript)
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0.25 g = _____ mg
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.25 g = 250 mg (move the decimal three decimals to the right)
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atomic # = # neutrons = # protons
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remember atomic number equals the number of neutrons equals the number of protons
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What state of matter has a material with no definite shape but a definate volume
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gas
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what group of the periodic table does lithium and potassium belong?
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alkali metals
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Remember your periodic table...
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...write what group is what on the top of every one. Make a note of groups, periods and families.
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What kind of ion is HCO3?
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a polyatomic ion
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heterogeneous mixtures
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are NOT uniform throughout
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When is a metal malliable
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if it can be hammered into thin sheets
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What is the base measure of mass?
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gram (g)
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Isotopes are atoms of the same element that have different _________.
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masses
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chemical bond formed when two atoms share one or more pairs of electrons
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covalent bond
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Where are all known chemical elements organized into groups based on similar chemical properties:
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periodic charg
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Metalloids are often ______________.
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Semiconductors
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the horizontal rows on the periodic table:
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periods
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Mass number for chlorine
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35
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When an atom gains 2 electrons, what does it become?
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anion
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Put these symbols of length in order from largest to smallest:
m, cm, km, mm |
km, m, cm, mm
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What is another name for a homogeneous mixture?
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solution
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What are the group numbers 3-12 on the periodic table know as?
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Transition elements
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What is the smallest unit of matter that maintains its chemical identity?
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atom
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SI base unit for time
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second
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Write 250 mL in scientific notation
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2.5 X 10^-1 L
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What is the appropriate unit for density?
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g/cm^3
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What is the common oxidation number of alkali metals
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an oxidation number of 1+
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