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94 Cards in this Set
- Front
- Back
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3.5 kg shovel is left outside through the winter. The shovel now is orange with rust is rediscovered, its mass is now 3.7 kg. How much oxygen combined with iron?
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.2 g of oxygen
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Two unknown compounds are analyzed. Compound 1 contains 5.63 g tin and 3.37 g of chlorine. Compund 2 contains 2.5 g of tin and 2.98of chlorine. Are they the same compund?
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No
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Determine the mass of .0458 moles of Sulfur?
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1.47 moles
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Ionic Bonds form between ___ and a ____.
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metal and non-metal
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The density of a substance is 4.8 g/ml. What is the mass of a sample that has a volume of 4.0 ml.
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THe volume is 19.
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The accepted value of the density of lead is 11.3 g/cm. The expirimentally determined density was 2.2 g/cm. What is the percent error?
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7.96%
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Balance this equation
Al(OH)3+NaNo3 to Al(NO3)3+NaOH |
Al(OH)3+3NaNo3 to Al(NO3)3+3NaOH
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Balance this equation
Al+CuCL2 to AlCl3+Cu |
2Al+3CuCL2 to 2AlCl3+Cu
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If an element is very reactive, it means the element is
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unstable
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How many orbitals are in the p sublevel
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3
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What is a chemical?
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Any substance that has a definite composition
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Waht is Chemestry?
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Its the study of matter and the changes it overgoes.
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What is matter?
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It is anything that has mass and takes up space
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What is Mass?
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It is the measurement that reflects the amount of matter.
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How are mass and weight similar?
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Mass is constant where ever you go and weight change on the amount of gravitational pull.
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What are scientific meathods?
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A systematic approach used in scientific study.
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What is qualitative data?
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Information that describes color, odor, shap, or some type of physical characteristics.
Usually an adjective. |
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What is quanitative data?
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A number used to describe pressure, volume, or the quanity of a substance.
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What is an independent variable?
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A variable which you plan to change.
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What is a dependent variable?
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its value changes in response to a change in the independent variable.
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What is a constant?
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a factor that is not allowed to change durring an expiriment
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A control is?
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a standard factor for comparisson
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A hypothesis is a?
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tenative explanation of observations
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A theory is?
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explanation supported by many expiriments
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A model is a?
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visual, verbal, and or mathmatical explanation of how things work.
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Why must a measurement include both a number and a unit?
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Show the different between the metric system and Si unit
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What is the difference between a base unit and a derived unit?
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Base unit is a system of measurement that is based on an object.
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What is the Si unit and symbol for time and temp.?
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time-seconds-s
temp-kelvin-K |
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Say the fallowing prefixes in order from smallest to larget.
centi, giga, kilo, mega, milli, nano, pico |
pico, nano, milli, centi, kilo, mega, giga
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Symbol for centi and kilo
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C and K
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How many grams are in a kilogram?
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1000 grams in one kilogram
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How many lieters are in a megalieter
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1 million
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What is the relationship between density, volume, and mass
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Desity is a ratio that compares the mass to its volume. D=M/V
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How are degrees Celcius converted to Kelvin?
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To convert celcius to kelvin add 273 degrees.
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Put in scientific notation
8394000000 |
8.394*10 to the 9
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What is a conversion factor
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A ratio of equivilen values used to express the same quanity of units.
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What is dimmensional analysis?
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A method of problem solving that changes the units of a problem.
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What is error?
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The difference betwwen an accepted value and an experimental value.
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What is percent error?
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The ratio of an error to an accepted value
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What is substance?
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A form of matter with a uniform and undergoing compostition.
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Waht are the four ways you can tell there was a chemical change?
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Change in color, gas being gived off, energy change, Temperture change
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Physical changes can be observed without changing___?
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A substance's chemical composition
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Chemical Properties can not be observed with out?
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changing the composition of a substance
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What are products in a chemical equation?
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The new substances that are formed in a chemical reaction.
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What are the reactants in an equation?
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The starting substances in a chemical reaction
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Waht is an element?
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A subatance that cannot be seperated into simpler substances?
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Waht is a chemical combination of two or more different elements?
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compound
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What is a period in the periodic table?
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The horizontal rows in the periodic table
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How do you find the number of neutrons in an atom?
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The atomic mass minus the number of protons.
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What is an isotope?
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the different possible versions of each element
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What is a quantum?
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The minimum amount of energy that can be lost or gained by an atom
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Waht is the ground state of an atom?
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The lowest allowable energy satate of an atom.
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Waht is an atomic orbital?
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A three-dimmenaional region around the nucleus representing the probability of finding an electron.
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Atomic orbitals do not have an exact____.
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size
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All s orbitals are______shaped.
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spherical
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The P orbitals are shaed like ______?
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dumbells
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What is an electron configuration?
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The arrangement of electrons in an atom
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A maximum of 2 electrons can occupy a single atomic orbital , only if the electrons have ____
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opposite spins
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What is a valance electron?
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the electrons in an atom's outermost orbitals.
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A column on the periodic table is called ?
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A group
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Group b metals
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transition metals
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Group 1A is known as?
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Alkali metals
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How many blocks is the periodic table divided?
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4
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What is an ion?
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An atom, or bonded group of atoms that have a positive or negative charge.
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An atom becomes negativley charged when?
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gaining an electrons.
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What is the octet rule?
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Atoms tend to gain, lose, or share electrons to acquire a full set of eight valance electrons.
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The p block contains?
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metals, metaloids, and noble gasses.
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What is a chemical bond?
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The force that holds two atoms together
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What is an anion?
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A negative charges ion
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What is a cation?
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A positive charged ion
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What is an ionic bond?
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a force that holds together atoms that are oppositly charged.
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Ionic compounds have a high?
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melting and boiling point
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What is a monotomic ion?
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A one-atom ion
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The name for an ion with more oxygen atoms ends with the suffix?
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-ate
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the name for an ion with fewer oxygen atoms ands with?
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-ite
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What is electronegativity?
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chemical bonds attracts electrons more.
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What is a covelant bond?
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a form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms
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What is a polar covelant bond?
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covalent bond between atoms of different electronegativities; a covalent bond with a positive end and a negative end.
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What is a non-polar covelant bond?
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water molecule is polar because there is an uneven distribution of electrons between the oxygen and hydrogen atoms
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An expiriment is...
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a set of controlled observations that test a hypothesis
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base unit
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a defined unit in a system of measurements
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Accuracy
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how close a measured value is to the accepted value
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Precision
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how close a series measurements are to one another
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Mixture
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combination of two or more pure substancesin which each retains their chemical properties
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Homogeneous mixtures are reffered to as
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solutions
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law of definite proportions
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regardless of the amount a compound is always composed of the same elements inthe same proportions of mass
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atom
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smallest particle of of an element
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wavelength
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shortest distance from frequencies
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amplitude
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height of a wave
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Hunds rule
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states that single electrons with the same spin must occupy equal energy orbital before electrons with opposite spins can occupy same orbital
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1A
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Alkali Metals
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2A
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Alkali Earth Metals
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Endothermic
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greater amount of energy is required to break bond
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Exothermic
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occur when more energy is released
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