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

Bohr's Model of the Atom

Niels Bohr (1913):

-studied the light produced when atoms

were excited by heat or electricity

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 Atom

Bohr's model:

-electrons orbit the nucleus like planets

orbit the sun

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

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

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.

- ORBITS REPRESENT AN ELECTRONS

ENERGY NOT DISTANCE OR LOCATION!!!

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 = 10

draw the nucleus with

protons & neutrons

9P

10N

Bohr's Model of the Atom

e.g. fluorine:

#P = 9

#e- = 9

#N = 10

how many electrons can

fit in the first orbit?

9P

10N

Bohr's Model of the Atom

e.g. fluorine:

#P = 9

#e- = 9

#N = 10

how many electrons can

fit in the first orbit?

2

9P

10N

Bohr's Model of the Atom

e.g. fluorine:

#P = 9

#e- = 9

#N = 10

how many electrons are left?

9P

10N

Bohr's Model of the Atom

e.g. fluorine:

#P = 9

#e- = 9

#N = 10

how many electrons are left? 7

9P

10N

Bohr's Model of the Atom

e.g. fluorine:

#P = 9

#e- = 9

#N = 10

how many electrons are left? 7

how many electrons fit in the

second orbit?

9P

10N

Bohr's Model of the Atom

e.g. fluorine:

#P = 9

#e- = 9

#N = 10

how many electrons are left? 7

how many electrons fit in the

second orbit? 8

9P

10N

Bohr's Model of the Atom

e.g. fluorine:

#P = 9

#e- = 9

#N = 10

9P

10N

Bohr's Model of the Atom

try these:

hydrogen

boron

magnesium

Bohr's Model of the Atom

try these:

hydrogen

1P

0N

Bohr's Model of the Atom

try these:

boron5P

6N

Bohr's Model of the Atom

try these:

magnesium

12P

12N