elementsymbol atomic number atomic mass # protons # electrons # neutrons oxygen o cobalt co lead pb
TRANSCRIPT
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O
COBALT Co
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8
COBALT Co
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16
COBALT Co
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8
COBALT Co
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8
COBALT Co
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27 59
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27 59 27
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27 59 27 27
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27 59 27 27 32
LEAD Pb
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27 59 27 27 32
LEAD Pb 82
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27 59 27 27 32
LEAD Pb 82 207
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27 59 27 27 32
LEAD Pb 82 207 82
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27 59 27 27 32
LEAD Pb 82 207 82 82
Isotopes 10/29/2008
Element
Symbol
Atomic
Number
Atomic
Mass
# Proto
ns
# Electro
ns
# Neutro
ns
OXYGEN O 8 16 8 8 8
COBALT Co 27 59 27 27 32
LEAD Pb 82 207 82 82 125
Review
Atomic Number = ______________
Review
Atomic Number = # protons
Atomic Mass = _______________
Review
Atomic Number = # protons
Atomic Mass = # protons + # neutrons
Neutrons = __________________
Review
Atomic Number = # protons
Atomic Mass = # protons + # neutrons
Neutrons = Atomic Mass – # protons
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08
Review Atomic Number = ProtonsAtomic Mass = Protons + NeutronsNeutrons = Atomic Mass – Protons
Isotopes What is the difference between
these 2 atoms?
Are they the same element?
Isotopes
There can be different types (varieties) of an element
An isotope is a different form of an element but with a different number of neutrons Same # of protons (same atomic
number)
Isotopes
If the number of neutrons is different, what else is different about the element? Atomic Mass = protons + neutrons
If the number of neutrons is different, the atomic mass is also different
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08
Review Atomic Number = ProtonsAtomic Mass = Protons + NeutronsNeutrons = Atomic Mass – Protons Isotopes Different forms of an element - Element with different # of neutrons - Atomic number is still the same
Isotopes
Not all elements have isotopes
If isotopes exist, the most common form of the element is the one found on the periodic table
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08
Review Atomic Number = ProtonsAtomic Mass = Protons + NeutronsNeutrons = Atomic Mass – Protons Isotopes Different forms of an element - Element with different # of neutrons - Atomic number is still the same
- # of proton is the same- Atomic Mass is different
- most common form found on periodic table
Isotope Symbols
Isotopes are abbreviated with the element and the atomic mass
Example: Helium-3 (He-3) the atomic mass is 3 how many neutrons
does it have?Atomic mass –
protons 3 – 2 =
1
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08 Representi
ng Isotopes
Element + Atomic MassEX. Helium-3
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08 Representi
ng Isotopes
Element + Atomic MassEX. Helium-3
EX 1: Hawkium-10 (Hk) has an atomic number of 5 and a mass number of 10.
Examples
# protons:
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08 Representi
ng Isotopes
Element + Atomic MassEX. Helium-3
EX 1: Hawkium-10 (Hk) has an atomic number of 5 and a mass number of 10.
Examples
# protons: 5# electrons:
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08 Representi
ng Isotopes
Element + Atomic MassEX. Helium-3
EX 1: Hawkium-10 (Hk) has an atomic number of 5 and a mass number of 10.
Examples
# protons: 5# electrons: 5# neutrons:
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08 Representi
ng Isotopes
Element + Atomic MassEX. Helium-3
EX 1: Hawkium-10 (Hk) has an atomic number of 5 and a mass number of 10.
Examples
# protons: 5# electrons: 5# neutrons: 5
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08
EX 2: Hawkium-12 (Hk) has an atomic number of 5 and a mass number of 12.
Examples
# protons:# electrons:# neutrons:
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08
EX 2: Hawkium-12 (Hk) has an atomic number of 5 and a mass number of 12.
Examples
# protons: 5# electrons:# neutrons:
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08
EX 2: Hawkium-12 (Hk) has an atomic number of 5 and a mass number of 12.
Examples
# protons: 5# electrons: 5# neutrons:
In an uncharged atom, the number of protons is the same as the number of ____________.
electrons
An uncharged atom has NO charge. Why?
Protons = electrons
Isotopes 10/29/08
EX 2: Hawkium-12 (Hk) has an atomic number of 5 and a mass number of 12.
Examples
# protons: 5# electrons: 5# neutrons: 7
How do we know that
Hawkium-12 and Hawkium-
10 are isotopes?
Hawkium-12 and Hawkium-10 are isotopes - same atomic number - different atomic mass different # neutrons
PRACTICE
Find the following information for Nitrogen-13, Nitrogen-14, and Nitrogen-15 Atomic Number:
Atomic Mass:
# Protons:
# Electrons:
# Neutrons:
Which isotope is the most common form of Nitrogen?