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INTRODUCTORY COURSE OF CHEMISTRY (Atoms (structure (electron (negative…
INTRODUCTORY COURSE OF CHEMISTRY
Atoms
matter
is made up of atoms
No. atoms in nature = 92
rare
extremely common in the universe
synthetic atoms
in nuclear reactors
in particle accelerators
structure
electron
negative charge
The charge of the electron is the smallest charge value found in nature
OR: the elementary charge = 1,6 x 10-19 C
AND: An electron has a charge of -1 elementary charge (or just -1)
proton: +1 elementary charge
e mass < p mass or n mass
usually neglected when calculating atomic mass
proton
positive charge
p mass = n mass
neutron
neutral particle
made up of smaller particles (with properties as mass, g and charge, C)
become ions
loose or recieve electrons