Exam (elaborations)
FPC 4,5 atoms and periodic table (1).
FPC 4,5 atoms and periodic table (1).
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FPC 4,5 atoms and periodic tableDalton - ANS-matter is made up of tiny particles, called atoms, that cannot be divided
into smaller pieces and cannot be destroyed
Thomson - ANS-a cathode ray tube, or an electron gun the 'plum pudding' model of the
atom. The negatively charged plums were surrounded by positively charged pudding.
Rutherford - ANS-Rutherford claimed that this also shows that the atom consists mostly
of empty space and that all the positive charge is not evenly spread throughout the
atom but instead squished into a teeny tiny nucleus in the center of the atom.
Bohr - ANS-bohr model:
Electrons orbit the nucleus in orbits that have a set size and energy.
The energy of the orbit is related to its size. The lowest energy is found in the smallest
orbit.
Radiation is absorbed or emitted when an electron moves from one orbit to another.
Schrodinger - ANS-Electron Cloud model: electrons move rapidly in regions of space, or
clouds around the nucleus
Goeppert-Mayer - ANS-Nuclei have shells: som elements have highly stable semetrical
spheres
Democritus - ANS-between atoms lies empty space; atoms are indestructible; have
always been, and always will be, in motion
nucleus - ANS-The positively charged central core of an atom, containing most of its
mass.
ion - ANS-an atom that has lost or gained electrons and therfore has a charge
mass number - ANS-The total number of protons and neutrons in a nucleus.
isotope - ANS-atoms same #of protons , different # of neutrons
valence electron - ANS-(valence electron) an electron in the outer shell of an atom
which can combine with other atoms to form molecules.
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