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Braun Chemistry #1

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



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