-
"Atomos" means "not to be cut," which refers to the smallest piece of matter.
Atoms are "uncuttable" -
All matter is made up of four
elements: fire, air, water and
earth.
Matter has four properties:
hot, cold, dry, and wet. -
Atoms are “uncuttable”.
Atoms of the same element are
exactly alike.
Atoms of different elements
are different. -
There are small, negatively
charged particles inside
an atom called electrons.
This theory led to the “plum
pudding” model, in which
negative particles are stuck in a
positively charged substance.
Atoms are made of a single
material that is formed into
different shapes and sizes. -
Atoms contain mostly
empty space.
Electrons are scattered around
the nucleus at a distance.
There is a small, dense,
positively charged nucleus. -
Most of an atom’s mass
is in the nucleus.
Electrons travel in paths
called energy levels.
Energy levels are located
certain distances
from the nucleus. -
Electrons move around the
nucleus billions of
times in one second.
Electrons’ locations depend
upon how much
energy they have.
Electrons are found in
electron clouds, not in paths.
