Diagramming the Structure of the Atom
Identify the parts of an element’s block on the Periodic Table.
Symbol
Atomic Mass
Name of Element
Atomic Number
6
C
Carbon
12.011
Atomic Number = # of ___protons__________________
Atomic Mass = # of ___protons_______________ and # of ____neutrons__________
together.
To find the number of protons, electron, and neutrons in the atom:
1. Protons = ___atomic
number__ 6________________________
2. Neutrons
a. Round off Atomic Mass to nearest whole number
b. _atomic
mass__ – Atomic Number
12 - 6 = 6
OR Atomic mass - # protons
3. Electrons = # ___protons______________ because atom is neutral.
6=6
# ___positive ________ charges = # ____negative________ charges.
Symbol
Al
Mg
Name
Atomic
Number
Atomic
Mass
(rounded)
aluminum
13
27
13
magnesium 12
24
12
hydrogen
1
1
1
H
Electrons are arranged in energy levels
Protons
Neutrons
Electrons
27-13 = 13
14
24-12 = 12
12
1-1 =0 1
First Energy Level holds up to _____2_____ electrons.
Second Energy Level holds up to ____8_____electrons.
Third Energy Level holds up to ____18_______electrons.
BUT we use___ 8
___electrons for diagramming due to the octet rule.
Pattern for Diagramming the Structure of an Atom:
Symbol_____________
Name of Element______________
Atomic Number_____________
Atomic Mass ________________
Nucleus
First Energy Level
Second Energy Level
Third Energy Level
# protons = _________
# neutrons = _________
# electrons = _________