Transcript Intro to Chemistry

Introduction of
Chemistry
What is chemistry?
Chemistry
• The science of the
composition, structure,
properties, and
reactions of matter
What is matter
•Matter-anything that
has mass and exists
as a solid, liquid, or
gas
All Matter exists in 3
states
• Solid-matter with a definite
shape and volume
• Liquid-matter with no definite
shape but has volume
• Gas-matter has neither shape
nor volume but has mass
3 Phases of matter
• All matter can
be found in 1 of
the 3 states
(mainly
dependent upon
temperature)
Intro to chemistry:
• Properties both physical and
chemicals come from the actual
structure of the element’s atom
or atomic design
Purest from of matter
• Element
• Element-Elements cannot be
reduced to simpler substances
by normal chemical means:
each element has its own
unique
properties/characteristics
Properties of matter
• Physical
• Chemical
Physical
• Properties that are
observed with the
senses and can be
found without
destroying matter
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Color
Length
Mass
Odor
Shape
Melting
Point/Boiling Point
Density
Ductility
Malleability
Conductivity
Chemical
• Properties that
show how
matter reacts to
other matter;
end matter is
different than
original matter
and has unique
physical
properties
• Stable/Unstable
• “All atoms want
to obtain a full
outer shell of
electrons to
become stable”
ATOM
• Smallest division of an element
that retains all the physical and
chemical characteristics of the
element
3 major parts of an atom
• Proton- “+” charge found in
nucleus
• Neutron- “neutral” charge
particle in nucleus
• Electron- “-” charge particle
found around nucleus
Atom Facts:
• Atoms were first thought of by
the Greeks over 2,400 years
ago. Atom name comes from
Greek meaning “indivisible”