Nature atomic model of Niels Bohr
atomic model, the cloud
is a model that scientists think is going to be most of the experiments and data processing. After the atom Niels Bohr. Has proposed a model atom up. May be summarized as follows:
1. The electrons can not run around the nucleus with a certain radius. Sometimes close, sometimes far away. I can not tell the exact location. But if I can only find electrons, atoms and electrons within the fast-moving electrons, like so much in common. In this way, atom-called "cloud"
2. fog of electrons in various energy levels are shaped differently depending on the number of electrons. And energy levels of electrons
3. Fog with low energy levels of electrons in the atom the electron has a high energy level is so far the nucleus
4. Each electron energy levels is not in power any one fixed
5. Atomic energy levels of electrons are
elementary particles of the atoms
of elementary particles of atoms,
each atom is composed of particles, protons, neutrons and electrons. The protons and neutrons inside the nucleus. This nucleus will occupy only a small area within the atom. And electrons around Nuclei at high speed Similar to a negatively charged group covered by the
charged particles (units) capacitor (C), mass (g) Mass (amu)
, electron -1 1.6 x 10 -19 0.000549 9.1096 x 10 -28
proton +1 1.6 x 10 -19 1.007277. 1.6726 x 10 -24
0 0 neutrons 1.6749 1.008665 x 10 -24
'electrons (Electron) the e - Carboniferous capacity is negative and much less mass
'proton p + symbol has a positive charge. And more massive than electrons (nearly 2,000 feet)
'Neutron charged symbol n is zero. And a mass much With protons and atomic mass number of the nuclear one. The number of protons in the nucleus, called the atomic number (Atomic Number, Z) 2. The sum of protons and neutrons is called the mass number (mass Number, A) A = Z + N, where N is the number of neutrons (mass number is. Integer and is close to the mass of an atom) to write the Nuclear write (A) at the top left of the symbol author (Z) at the bottom left of the symbol X = symbol of the elements.
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