Transcript Chemistry week 1: words

CHEMISTRY WEEK 2: WORDS
Matter
2. Physical Properties
3. Chemical Properties
4. Pure Substance
5. Mixture
6. Homogeneous
7. Heterogeneous
8. Element
9. Molecule
10.Solute
11.Solvent
12.Compound
1.
WORD OF THE DAY :
 MATTER:
Anything that has a mass and
takes up space.
 PHYSICAL
PROPERTIES: a property
that can be observed without changing the
identity of the substance.
 CHEMICAL
PROPERTIES:
characteristics of a material that cannot
be observed without causing a chemical
change.
WORD OF THE DAY:
 PURE
SUBSTANCE: A sample of matter that
has definite chemical and physical properties
and cannot be changed into a simpler substance.
 MIXTURE:
Combination of two or more pure
substances that are NOT chemically combined
 HOMOGENEOUS:
an even distribution
Molecules are mixed up in
 HETEROGENEOUS:
Molecules are NOT
mixed up in an even distribution
WORD OF THE DAY:
 ELEMENT:
Pure substances that cannot be
separated into simpler substances
 MOLECULE:
Composed of two or more
elements that are joined by a chemical bond.
 COMPOUND:
Pure substance composed of
two or more different elements joined by
chemical bonds
 SOLUTE:
Substance being dissolved
 SOLVENT:
in
Substance the solute is dissolved
CHEMISTRY WEEK 2: WORDS
Physical Change
2. Chemical Change
3. Sublimation
4. Precipitate
5. Periodic Table
6. Atom
7. Proton
8. Neutron
9. Electron
10. Nucleus
11. Electron Cloud/Shell
12. Particle Charge
1.
WORD OF THE DAY:
 Physical
Change: A change to a substance
that does not destroy a substance, but
changes what it looks like
 Chemical Change: Occurs after a reaction
when what is formed/left over is not the
same as the stuff that was started with.
 Sublimation: Transition directly from a
solid to a gas phase.
 Precipitate: A solid that is formed when
two liquids are mixed
WORD OF THE DAY:
 Periodic
Table: a chart used to organize
the elements
 Atom: smallest unit of matter
 Proton: positively charged particle in an
atom’s nucleus
 Neutron: a neutrally charged particle
found in the nucleus of an atom
 Electron: a negatively charged particle
found in shells orbiting the nucleus of an
atom
WORD OF THE DAY:
Electron
Cloud/Shell: the area
around the nucleus of an atom
where the electrons can be found
Particle Charge: A particle
with an electric charge; Any
particle with a deficit or excess
electrons.
CHEMISTRY WEEK 3: WORDS
Mendeleev
2. Moseley
3. Periods
4. Groups
5. Atomic Mass
6. Atomic Number
7. Mass Number
8. Metalloid
9. Noble Gases
10.Non-Metals
11.Ion
12.Ionic Bond
1.
WORD OF THE DAY:
Mendeleev: Scientist known for
constructing the first periodic table,
arranged by atomic mass
 Moseley: later discovered that the
periodic table was associated with
atomic number, not atomic mass
 Periods: Horizontal row of elements
in the Periodic Table
 Groups: (Family) elements in the
same vertical column of the Periodic
Table

WORD OF THE DAY:






Atomic Mass: Total mass of an atom; The
rational (decimal) number in the element box
Atomic Number: Number of protons in an
atom
Mass Number: Number of protons plus
Number of Neutrons (Protons + Neutrons)
Metalloid: Elements that have properties of
both metals and non-metals; found along the
stair-step of the periodic table.
Noble Gases: Group 18 on the periodic table;
these elements are gases that do not usually
combine or react with other elements
Non-Metals: Elements that have dull surfaces
and are poor conductors of electricity, found on
the right of the periodic table
WORD OF THE DAY:
 Ion:
An atom that has a charge
because it added or lost an
electron
 Ionic Bond: A magnetic
connection formed between two or
more atoms as a result of giving
and receiving atoms
CHEMISTRY WEEK 4: WORDS
Law of Conservation of
Mass
2. Reactants
3. Products
4. Reaction
5. Reactivity
6. Yields
7. Endothermic
8. Exothermic
9. Flammability
10.Malleability
11.Natural Substance
12.Potency
1.
WORD OF THE DAY:
Law of Conservation of Mass: In
a chemical reaction, matter cannot
be created or destroyed; you have
what you started with, it just looks
different
 Reactants: Substances going in to a
reaction (The starting “ingredients”)
 Products: What is made during a
reaction (The ending substance)

WORD OF THE DAY:
 Reaction:
A change to substance
based on the chemical properties of
the other substances it is exposed to
 Reactivity: How likely an element
is to bong or change when exposed to
another element
 Yields: Results in, or becomes
 Endothermic: Taking in energy
 Exothermic: Giving off or
producing energy (releases heat)
WORD OF THE DAY:
1. Flammability:
The ability of
something to burn
2. Malleability: Ability of something to
be hammered or flattened without
breaking
3. Natural Substance: Any substance
that can be found in nature, that man
does not have to make
4. Potency: How strong a chemical is