MATTER AND ATOM
MATTER
Matter is
everything that extends in a certain region of spacetime, has a certain amount
of energy and therefore is subject to changes in time and interactions with
measuring devices. It is considered to be what forms the sensitive part of the objects
perceptible or detectable by physical means.
ATOM
Each Atom
is composed of one nucleus and one or more electrons attached to the nucleus.
The nucleus is composed of one or more protons and typically a similar number
of neutrons. Protons and neutrons are called nucleus more than 99,94% of the
atom´s massif the Nucleus. Protons have a positive electrical charge, electrons
have a negative electrical charge and the neutrons have both electrical
charges, making them neutral. If the number protons and electrons are equal,
that atom is electrically neutral.
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