Bohr's Model of the Atom

Bohr's Model of the Atom

Niels Bohr (1913):

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

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

orbit maximum # electrons

1 2

2 8

3 8

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'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?

2

9P10N

Bohr's Model of the Atom

e.g. fluorine:#P = 9

#e- = 9

#N = 10

how many electrons are left?

9P10N

Bohr's Model of the Atom

e.g. fluorine:#P = 9

#e- = 9

#N = 10

how many electrons are left? 7

9P10N

Bohr's Model of the Atom

e.g. fluorine:#P = 9

#e- = 9

#N = 10

how 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 = 10

how many electrons are left? 7how many electrons fit in the

second orbit? 8

9P10N

Bohr's Model of the Atom

e.g. fluorine:#P = 9

#e- = 9

#N = 10

9P10N

Bohr's Model of the Atom

try these:

hydrogen

boron

magnesium

Bohr's Model of the Atom

try these:

hydrogen

1P0N

Bohr's Model of the Atom

try these:

boron5P6N

Bohr's Model of the Atom

try these:

magnesium

12P12N