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Terms in this set (53)
physical or chemical properties
properties of matter can be classified as either
distinguish one kind of matter from another.
can be measured without changing a substance into a different substance.
odor, color, hardness, density, solubility, and electrical conductivity.
describe how a substance unites with other substances to form new substances.
ex. the tendency to burn or rust.
takes place when 2 or more sustances unite or break apart chemically(such as burning or rusting).
most basic components of the physical world around us.
are not always found as single atoms.
can be complicated, like buckminsterfullerene C60)
H2, O2, N2, I2, F2, Cl2, Br2 (2s are bottom exponents)
groups of 2 or more atoms that are linked together by chemical bonds.
>single type of atom>element.
composed of different types of atoms linked together.
combination of 2 or more kinds of elements.
may be simple or complicated.
can be formed from same elements.
the sum of the atomic masses(in atomic mass units- AMU) of all the atoms in a molecule.
elements and compounds
are pure substances.
composition is the same throughout.
are composed of several elements of compounds that are physically mixed but not chemically united.
if the molecules of the 2 substances are completely mixed, this uniform mixture occurs.
a mixture containing tiny clumps or particles that remain suspended within the mixture.
characterized by a milky appearance under bright light.
2 divisions pure substances and mixtures
division of pure substances
compounds and elements(chemical changes).
division of mixtures
solution colloids and other mixtures.
(see colloid chracteristics) this occurs because the clumps or particles scatter the light passing through the mixture.
water droplets suspended in air.
solid particles suspended in air.
droplets of milk-fat and protein suspended in water.
protein suspended in water.
butter of antimony, sal arnmolac, spiritual salis.
methods of chemical nomenclature
published by a group of french anemists.
a book providing a logical and organized system of prefixes and suffixes for naming chemical compounds.
a compound consisting of an atom of uranium and 6 atoms of fluorine.
combinations of chemical symbols and numbers showing the type of atoms in a compound.
3 major kinds of formulas
molecular formula , structural formula, empirical formula.
the most informative type of formula.
shows the general arrangement of the atoms in a molecule.
gives the number of atoms in a molecule.
shows the simplest ratio of atoms in a molecule.
components retain their own properties.
substance A + substance B = blend of substances A and B.
components present in variable proportions.
substances can be separated without a chemical reaction.
components lose their properties to form a new substance with its own properties.
substance A + substance B = new substance C.
components combined chemically in invariable proportions.
substances cannot be separated without a chemical reaction.
when naming a compound, change the last part to ____.
ex. oxide , fluoride, etc.
mono is used only
when there is( H, C, and N) another compound composed of the same type of atoms in different numbers.
ex. carbon + oxygen = CO and CO2.
types of mixtures
are classified into 3 groups depending on how the molecules of the solute are distributed in the solvent.
3 types of mixtures
solution, colloid, third type.
occurs when discrete particles of one substance are mixed with discrete particles of another substance, but the mixing is less thorough than in a solution or colloid.
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