Unit 3: Chemistry. Isotopes.
Bell Ringer
Unit 3: Chemistry. Isotopes.
Isotope: Atoms that have the same number of protons but
have different number of neutrons.
These are both oxygen atoms because each has 8 PROTONS.
Unit 3: Chemistry. Isotopes.
Isotope Notation
A
X
X= symbol of the
element
A= atomic mass
Unit 3: Chemistry. Isotopes.
Isotope Notation
Element Symbol - Atomic Mass
Element Name - Atomic Mass
Unit 3: Chemistry. Isotopes.
LET’S TRY
What element are these atom?
HYDROGEN
Unit 3: Chemistry. Isotopes.
LET’S TRY
What are the 3 ways we can represent this
Hydrogen atom in isotope notation ?
Hydrogen- 2
H- 2
2H
Unit 3: Chemistry. Isotopes.
LET’S TRY
What element are these atom?
CARBON
Unit 3: Chemistry. Isotopes.
LET’S TRY
How do we represent these Carbon atoms in
isotope notation ?
Carbon- 13
Carbon- 14
C- 13
C- 14
13C
14C
Unit 3: Chemistry. Isotopes.
LET’S TRY
An atom of Helium-3 will
have all of the following
EXCEPT
a. An atomic number of 2
b. 2 electrons
c. 2 protons
d. 2 neutrons