Name: _______________________________________ Date: _____________ B#: _____
Atomic Structure:
What 2 parts of an atom does the
atomic # represent?
8
O
____________ & _____________
Oxygen
How do you figure out the # of
neutrons?
___________________________
15.999
6
# P: ____
C
Carbon
12.011
10
# E: ____
Ne
# N: ____
20.179
Neon
19
# P: ____
K
# E: ____
Potassium
# N: ____
39.098
# P: ____
# E: ____
# N: ____
CREATING BOHR DIAGRAMS
Rules for arranging electrons:
1.
2.
3.
The 1st energy level can hold up to 2 electrons.
The 2nd energy level can hold up to 8 electrons.
The 3rd energy level can hold up to 8 electrons.
Sketch An Atom
What term is used to
describe the electrons in
the outermost energy level?
_____________________
Sketch An Atom
Draw 5 protons in
the nucleus and
label with the
charge.
Draw 3 protons in
the nucleus and
label with the
charge.
Draw 6 neutrons in
the nucleus and
label with the
charge.
Draw 4 neutrons in
the nucleus and
label with the
charge.
Draw 2 electrons in
the 1st energy level
and label with their
charge.
Draw 2 electrons in
the 1st energy level
and label with their
charge.
Draw 3 electrons in
the 2nd energy level
and label with their
charge.
Draw 1 electrons in
the 2nd energy level
and label with their
charge.
What element is
represented?
What element is
represented?
Neon
Magnesium
#P
#P
#E
#E
#N
#N
# of Valence
Electrons
# of Valence
Electrons
Atomic #: 10
Mass #: 20
Atomic #: 12
Chlorine
Silicon
#P
#P
#E
#E
#N
#N
# of Valence
Electrons
# of Valence
Electrons
Atomic #: 17
Mass #: 24
Mass #: 35
Atomic #: 14
Mass #: 28
CREATING LEWIS DOT DIAGRAMS
Rules for arranging electrons:
1.
2.
Figure out how many valence electrons the element has in its atom.
Place dots around the element’s symbol one at a time (can’t exceed 8).
Ne
Mg
Cl
Si
KEY
Atomic Structure:
8
O
Oxygen
15.999
Atomic Number
What 2 parts of an atom does the
atomic # represent?
Element Symbol
# of protons & # of electrons
Element Name
How do you figure out the # of
neutrons?
subtract atomic # from atomic mass
Atomic Mass
6
10
# P: 6
C
Carbon
12.011
# E: 6
Ne
# N: 6
20.179
Neon
19
# P: 10
# P: 19
K
# E: 10
Potassium
# N: 10
39.098
# E: 19
# N: 20
CREATING BOHR DIAGRAMS
Rules for arranging electrons:
1.
2.
3.
The 1st energy level can hold up to 2 electrons.
The 2nd energy level can hold up to 8 electrons.
The 3rd energy level can hold up to 8 electrons.
Sketch An Atom
Draw 5 protons in
the nucleus and
label with the
charge.
Draw 6 neutrons in
the nucleus and
label with the
charge.
Draw 2 electrons in
the 1st energy level
and label with their
charge.
Note: Students are asked to
sketch each part of the atom
w/charge.
5P
6N
Draw 3 electrons in
the 2nd energy level
and label with their
charge.
What element is
represented?
What term is used to
describe the electrons in
the outermost energy level?
Valence Electrons
Sketch An Atom
Draw 3 protons in
the nucleus and
label with the
charge.
Draw 4 neutrons in
the nucleus and
label with the
charge.
Draw 2 electrons in
the 1st energy level
and label with their
charge.
Note: Students are asked to
sketch each part of the atom
w/charge.
3P
4N
Draw 1 electrons in
the 2nd energy level
and label with their
charge.
Boron
What element is
represented?
Lithium
Neon
#P
10
#E
10
#N
10
Magnesium
10 P
10 N
# of Valence
Electrons
12
#E
12
#N
12
Mass #: 20
17
#E
17
#N
18
#P
14
#E
14
#N
14
# of Valence
Electrons
7
Atomic #: 17
Mass #: 24
Silicon
17 P
18 N
# of Valence
Electrons
2
Atomic #: 12
Chlorine
#P
12 P
12 N
# of Valence
Electrons
8
Atomic #: 10
#P
Mass #: 35
Atomic #: 14
14 P
14 N
4
Mass #: 28
CREATING LEWIS DOT DIAGRAMS
Rules for arranging electrons:
1.
2.
Figure out how many valence electrons the element has in its atom.
Place dots around the element’s symbol one at a time (can’t exceed 8).
Ne
Mg
Cl
Si