This Is A Powerpoint I Did In School In Science Class. I Want To Put This Up Here So If People Are Doing Compounds & Mixtures, My Powerpoint Can Help Them . I Dont Know If It's Good Enough But It Has Good Information. Try Looking Through It And See If It Can Help You On Your Stuff Or Something In Science Class.
2. A chemical compound is a
pure chemical substance
consisting of two or
more different chemical
elements that can be
separated into simpler
substances by chemical
reactions.
3. In chemistry, a mixture is a
material system made up of
two or more different
substances. They are mixed
but are not combined
chemically.
4. Heterogeneous
and homogeneous refer to
mixtures of materials in chemistry. The
difference between heterogeneous and
homogeneous mixtures is the degree at which
the materials are mixed together.
5.
Elements, Compounds & Mixtures Elements
Microscopic view of the atoms of the element argon (gas phase). Microscopic view of the molecules of the element
nitrogen (gas phase). Note that an element:
consists of only one kind of atom,
cannot be broken down into a simpler type of matter by either physical or chemical means, and
can exist as either atoms (e.g. argon) or molecules (e.g., nitrogen).
A molecule consists of two or more atoms of the same element, or different elements, that are chemically bound
together. Note that the two nitrogen atoms which comprise a nitrogen molecule move as a unit.
Compounds
Microscopic view of the molecules of the compound water (gas phase). Oxygen atoms are red and hydrogen atoms are
white. Note that a compound:
consists of atoms of two or more different elements bound together,
can be broken down into a simpler type of matter (elements) by chemical means (but not by physical means),
has properties that are different from its component elements, and
always contains the same ratio of its component atoms.
Mixtures
Microscopic view of a gaseous mixture containing two elements (argon and nitrogen) and a compound (water). Note
that a mixture:
consists of two or more different elements and/or compounds physically intermingled,
can be separated into its components by physical means, and
often retains many of the properties of its components.
6. The two most basic types of bonds are
characterized as either Ionic or
Covalent. In ionic bonding, atoms
transfer electrons to each other. Ionic
bonds require at least one electron donor
and one electron acceptor. In contrast,
atoms that have the same
electronegativity share electrons in
covalent bonds since donating or
receiving electrons is unfavorable.
7. The differences between a mixture and a compound.
A mixture can contain components in any proportions
while a compound contains components in fixed
proportions.
All components in a mixture do not chemically react,
while the components in a compound do react and their
original properties are lost.
The separation of a mixture in its components is made
by physical means while the separation of a compound
in its components is possible only by chemical means.
There exists chemical reactions when a compound is
formed while in the formation of a mixture chemical
reactions are not involved.