Braun Chemistry #1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Aluminum | Al
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| Argon | Ar
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| Arsenic | AS
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| Barium | Ba
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| Bromine | Br
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| Cadmium | Cd
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| Calcium | Ca
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| Carbon | C
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| Cesium | Cs
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| Chlorine | Cl
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| Chromium | Cr
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| Cobalt | Co
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| Copper | Cu
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| Fluorine | F
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| Gold | Au
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| Helium | He
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| Hydrogen | H
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| Iodine | I
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| Iron | Fe
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| Lead | Pb
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| Lithium | Li
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| Magnesium | Mg
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| Manganese | Mn
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| Mercury | Hg
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| Neon | Ne
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| Nickel | Ni
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| Nitrogen | N
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| Oxygen | O
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| Phosphorus | P
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| Potassium | K
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| Silicon | Si
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| Silver | Ag
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| Sodium | Na
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| Strontium | Sr
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| Sulfer | S
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| Tin | Sn
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| Zinc | Zn
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| atom | the limit of chemical subdivision for matter
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| basic unit of measurement | a specific unit from wwhich other units for the same quantity are obtained by mulitplication or division
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| chemical changes | canges matter undergoes that involve changes in composition
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| chemical properties | properties mater demonstrates when attempts are made tp chane it into new substances
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| compound | pure substances consisting of two or more kinds of atoms in the form of heteroatomic molecules or individual atoms
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| density | the number given when the mass of a smaple of a substance in divided by the volume of the same sample
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| What are the proper units of measurement for density? | ?
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| derived unit of measurement | a unit obtained by the dividion or mulitplication of one or more basic units
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| diatomic molecules | molecules that contain one atom
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| element | a pure substance consisting of only one kind of atom in the form of homoatomic molecules or individual atoms
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| exact numbers | numbers that have no uncertainty
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| factors unsed in the factor-unit method | fractions obtained from numerical relationships between quantities
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| heteroatomic molecules | molecules that contain two or more kind of atoms
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| hetergeneous matter | matter ith properties that are not the same throughout the sample
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| homoatomic molecules | molecules that contain only one kind of atom
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| homogeneous matter | matter that has the same properties throughout the sample
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| mass | a measurement of the amount of matter in an object
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| matter | anything that has mass and occupies space
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| mixture | a physical blend of matter that can theoretically be physically separated into two or more components
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| molecule | the smallest particale of a pure substance and is capable of a stable independent existance.
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| What is the limit of physical subdivision for a pure substance? | a molecule
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| physical changes | changes matter undergoes without changing composition
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| physical properties | properties of matter that can be observed or measured without trying to change the composition of the matter being studied
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| polyatomic molecules | molecules that contain more that three atoms
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| pure substance | matter that has a constant composition and fixed properties
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| scientific models | eplainations for observed behavior in nature
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| scentific notation | a way of representing numbers consisting of a product between a nonexponential number and 10 raised to a whole number exponent that may be positive or negative
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| signficant figures | the numbers in a measurement that represent the certainty of the measurement, plus one number representing an estimate.
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| solutions | homogeneous mixtures of two or more pure substances
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| What state of matter are solutions almost always found in? | liquid
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| standard position for a decimal | in scentific notation, the position to the right of the first nondigit in the nonexponential number
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| triatomic molecules | molecules that contain three atoms
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| weight | a measurement of the gravitational force acting on an object
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| elemental symbol | a symbol assigned to an element based on the name of the element, consisting of one capital letter or one capital letter followed by a lowercase letter
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| compound formula | a representation of the molecule of a compound, consisting of the symbols of the atoms found in the molecules
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| nucleus | the central core of atoms that contains protons, neutrons, and most of the mass of atoms
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| mass number of an atom | a number equal to the sum of protons and neutrons in the nucleus of an atom.
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| What is the symbolic representation of the mass number of an atom? | A
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| isotopes | atoms that have the same atomic number but different mass numbers. THAT IS, they are atoms of the same element that contain different numbers of neutrons in their nuclei.
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| atomic mass unit (u) | a unit used to express the relative masses of atoms.
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| What is a u equal to? | one u is equal to 1/12 the mass of an atom od carbon-12.
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| atomic weight | the mass of an average atom of an element expressed in atomic mass units
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| molecular weight | the relative mass of a molecule expressed in atomic mass units and ccalculated by adding together the atomic weights of the atoms in the molecule
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| mole | the number of particules (atoms or molecules) contained in a sample of element or compound with a mass in grams equal to the atomic or molecular weight, respectively.
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| What is one mole equal to numerically? | 6.02 x 10^23
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Created by:
tanderson19
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