Chemistry is...
... the science that seeks to understand what matter does by studying what atoms and molecules do
Matter
any substance that occupies space and has mass.
States of matter
Solid, Liquid and Gas
Atom
Basic building block of all matter.
Chemical Bond
an attractive force that holds together the atoms, ions, or groups of atoms in a molecule or compound.
International System (SI)
the unit system for science
Theory
a hypothesis that has been tested with a significant amount of data
Hypothesis
a testable prediction, often implied by a theory.
Intermolecular force
attractive forces between molecules holding them in a form to create liquids and solids
Covalent bond
a bond formed when atoms share one or more pairs of electrons
Ionic Bond
a bond that results from electrostatic attraction between oppositely charged ions. The cation is positively charged, while the anion is negatively charged.
Exothermic Reaction
Heat and energy are released by a reaction
Endothermic Reaction
Heat and energy are absorbed by a reaction
Derived Units
Formed from other units
Volume
A measure of space (lwh)
Density
amount of mass per units volume
Mass
A measure of the total amount of material that makes up an object.
Nano-
10^ -9
Micro-
10^ -6
Milli-
10^ -3
Kilo-
10^ 3
Mega-
10^ 6
Giga-
10^ 9
Centi-
10^ -2
Deci-
10^ -1
1cm
10mm is how many cm?
1dm
10cm is how many dm?
1m
10dm is how many m?
1000mm
1m is how many mm?
100cm
1 m
2.54 cm
1in is how many cm?
1mL
1cm^ 3 is how many mL
1L
1000cm^ 3 = 1000mL = ?
matter
any substance that occupies space and has mass.
Solid
Fixed shape and size, atoms are close together, ordered structure, not compressible
Liquid
Only two elements are this state of matter at room temperature ...
Gas
Expands to fill whatever volume is available.
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