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Topic: Bohr atom

	Niels Henrik David Bohr
		In 1916, Bohr became professor of theoretical physics at the Univ. of Copenhagen, and in 1920 he was made director of the Institute of Theoretical Physics, which he was instrumental in founding.
		Bohr provided the solution to this problem in 1913, when he postulated that electrons move around the nucleus of the atom in restricted orbits and explained the manner in which the atom absorbs and emits energy.
		Bohr was a leading figure in the continuing development of the quantum theory over the next twenty years.
	www.factmonster.com /ce6/people/A0808132.html (383 words)

	Ensiklopedia :: encyclopedia : Atom (Site not responding. Last check: 2007-11-01)
		Atom ialah zarah neutral yang paling kecil bagi suatu unsur dan boleh mengambil bahagian dalam tindakbalas kimia.
		Perkataan atom berasal dari bahasa Yunani yang bermaksud sesuatu yang tidak boleh dipecahkan lagi.
		empat ikatan kovalen dari molekul metana Selain itu atom karbon mempunyai kemampuan untuk membentuk ikatan dengan atom karbon lain membentuk rantai karbon yang terbuka atau tertutup/berlingkar.
	www.ensiklopedia.info /Atom (210 words)

	Bohr atom
		A model of the atom, first described by Niels Bohr, that explains emission and absorption of radiation as transitions between stationary electronic states in which the electron orbits the nucleus at a definite distance.
		The Bohr model violates the Heisenberg uncertainty principle, since it postulates definite paths and momenta for electrons as they move around the nucleus.
		Modern theories usually use atomic orbitals to describe the behavior of electrons in atoms.
	www.daviddarling.info /encyclopedia/B/Bohr_atom.html (141 words)

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