atomic structure
DESCRIPTION
this is about chemicalTRANSCRIPT
Aury Márquez 49
Carolina Torres 49
Nancy Uzcategui 49
Ivana Navas 49
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LEUCIPO DEMOCRITUS
The atomistic philosophy of Leucippus and Democritus could be summarized as:
1.-The atoms are eternal, indivisible, homogeneous and invisible.
2.-The atoms differ in shape and size.
3.-The properties of matter vary grouping of atoms.
AIR
FIRE WATER
EARTH
EMPEDOCLE IV b.C
In the fourth century. BC, Empedocles postulated that
matter consisted of four elements: earth, air, fire and
water
Aristotle subsequently postulated
that matter was made up of those
4 elements but denies the idea
of atom, a fact that was
maintained until 200 years later
in the thinking of mankind.
In 1808, John Dalton
1.-The elements are composed of
tiny, indivisible particles called
atoms and unalterable.
Dalton established a system for
designating each atom so that could
distinguish between different
elements
The electron
commonly represented
by the symbol e, is a
subatomic particle
with a negative
elementary charge
The particle nature of the electron was
demonstrated for the first time with a
Crookes tube. In this illustration, an
electron beam profile projected cross-
shaped target against the tube face
he is a subatomic particle with a positive
electric charge elementary
The neutron is a subatomic particle, a
nucleon, no net charge present in the
atomic nucleus of virtually all atoms
except protium.
All bodies are
composed of
Atoms
An atomic bomb is a device that gets a lot of
explosive energy nuclear reactions. Its
operation is based on a nuclear trigger
uncontrolled chain reaction
ATOMIC BOMB
the atomic bomb is composed of millions
of atoms of uranium
The electron
was discovered
by JJ Thomson
in 1897 at the
Cavendish
Laboratory at
Cambridge
University,
studying the
behavior of
cathode rays.
The neutron was
first identified
in 1932 by the
British physicist
James Chadwick
Proton
existence
was first
tested by
Ernest
Rutherford
water molecule iron molecule
Salt molecule titanium molecule
In the following we present an
example of image creating a
quantum "pen" by displacement of
iron atoms on a surface of cobalt.
FIRST IMAGE OF A REAL ATOM
Images of molecules from a microscope