Upload
ross-adrales-gelera
View
222
Download
0
Embed Size (px)
DESCRIPTION
borh
Citation preview
Development of Atomic Models
Bohr's Model of the Atom
Bohr's Model of the Atom
Niels Bohr (1913):-studied the light produced when atoms were excited by heat or electricity
Bohr's Model of the Atom
Niels Bohr (1913):-studied the light produced when atoms were excited by heat or electricity
Rutherford's model couldn't explain why unique colours were obtained by atoms ofdifferent elements
Bohr's Model of the Atom
Niels Bohr (1913):-studied the light produced when atoms were excited by heat or electricity
Rutherford's model couldn't explain why unique colours were obtained by atoms ofdifferent elements
Bohr proposed that electrons are in orbits & when excited jump to a higher orbit. When they fall back to the original they give off light
Bohr's Model of the AtomBohr's model:-electrons orbit the nucleus like planets orbit the sun
Bohr's Model of the AtomBohr's model:-electrons orbit the nucleus like planets orbit the sun-each orbit can hold a specific maximum number of electrons
Bohr's Model of the AtomBohr's model:-electrons orbit the nucleus like planets orbit the sun-each orbit can hold a specific maximum number of electrons
orbitmaximum # electrons122838 4 18
Bohr's Model of the Atom
Bohr's model:-electrons orbit the nucleus like planets orbit the sun-each orbit can hold a specific maximum number of electrons-electrons fill orbits closest to the nucleus first.
Bohr AtomThe Planetary Model of the Atom
Bohrs ModelNucleusElectronOrbitEnergy Levels
Bohr's Model of the Atom
e.g. fluorine:#P =
#e- =
#N =
Bohr's Model of the Atom
e.g. fluorine:#P = atomic # = 9#e- =
#N =
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = # P = 9#N =
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = 9
#N = atomic mass - # P = 10
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = 9
#N = 10draw the nucleus with protons & neutrons
9P10N
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = 9
#N = 10how many electrons canfit in the first orbit?9P10N
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = 9
#N = 10how many electrons canfit in the first orbit?29P10N
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = 9
#N = 10how many electrons are left?9P10N
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = 9
#N = 10how many electrons are left?79P10N
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = 9
#N = 10how many electrons are left?7how many electrons fit in the second orbit?9P10N
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = 9
#N = 10how many electrons are left?7how many electrons fit in the second orbit?89P10N
Bohr's Model of the Atom
e.g. fluorine:#P = 9
#e- = 9
#N = 109P10N
Seatwork #4 :
Sodium
Boron
Magnesium
Oxygen
**Objectives:To describe the Bohr model of the atom.To explain the relationship between energy levels in an atom and lines in an emission spectrum.*