Zusammenfassung der Ressource
Chemistry Test 1 Stuff
- Why study chemistry?
- Chemistry can be useful in explaining the natural
world, preparing people for career opportunities,
and producing informed citizens.
- Chemistry is the study of matter
- Matter is Anything that has
mass and takes up space
- Matter is made up of atoms
- Atoms are made up of protons,
electrons, and neutrons.
- Unique combinations of Protons, Neutrons,
and Electrons make up elements.
- elements form
molecules.
- Molecules have shapes and geometries
- Elements are a molecule of only one kind of
atom. Cannot be broken into simpler units by
chemical means (Sodium, Helium, Etc.)
- Elements are organized on the
periodic table of elements
- On the Periodic table, Columns are
groups and rows are periods
- Physical matter has 3 main states
- Solid (Rigid and
has volume
- Liquid(Fluid and
has volume)
- Gas (Fluid without
definite shape
- Mass is how much matter something has
- Weight is the gravitational pull
of something.
- Work is a result of moving an object a
certain distance
- Chemistry fields examples
- Organic
Chemistry
- Inorganic
Chemistry
- Biochemsitry
- Analytical
Chemistry
- Environmental
Chemistry
- Chemical equations
- describe chemical reations
when balanced
- Pure substances are elements and
compounds without impurities
- Compounds are two elements
chemically combined
- The Law of Constant Composition
- no matter where you go in the Universe, compounds will
always be made of the same stuff. (Water on earth is the same
chemically as water on Europa or Mars)
- Mixtures are two substances
NOT chemically combined
- Heterogeneous Mixtures look
the different throughout
- Homogeneous Mixtures look the
same throughout
- Pure substances have Physical
and Chemical Properties
- Physical properties can be observed
without changing the substance
chemically.
- Physical changes don't change the
composition of a substance
- Chemical properties can only be
observed when chemically changing
the substance
- Chemical change changes the
composition of a substance