Protons, Neutron, and Electrons Protons, Neutron, and Electrons

Jeremy FisherJeremy Fisher

Nicole SchaefferNicole Schaeffer

Spring 2003Spring 2003

                                               

ProtonsProtons

A particle having a positive electrical A particle having a positive electrical charge e+charge e+

Every atomic nucleus contains protonsEvery atomic nucleus contains protons For more information hit the link For more information hit the link

http://www.neutron.anl.gov/hyper-physics/phttp://www.neutron.anl.gov/hyper-physics/proton.htmlroton.html

Protons are equal to the atomic numberProtons are equal to the atomic number

                                                 

NeutronsNeutrons

Neutrons are neutrally charged particles Neutrons are neutrally charged particles within the atomic nucleuswithin the atomic nucleus

They were discovered by James Chadwick They were discovered by James Chadwick in 1932in 1932

In a nuclear accelerator they determined In a nuclear accelerator they determined that neutrons are formed by that neutrons are formed by quarksquarks, one up , one up and two downand two down

Are equal to the atomic mass subtracted by Are equal to the atomic mass subtracted by the atomic numberthe atomic number

                                                 

ElectronsElectrons

Are negatively charge particles that Are negatively charge particles that encompasses the atomic nuclei e-encompasses the atomic nuclei e-

Were discovered by J.J. Thomson.Were discovered by J.J. Thomson. Are also equal to the atomic number unless Are also equal to the atomic number unless

the atom is an ion such as a –1, -2, -3… the atom is an ion such as a –1, -2, -3…                                                                                                    

ExampleExample

Helium has an atomic # of 2 and a atomic Helium has an atomic # of 2 and a atomic mass of 4.00 g/molmass of 4.00 g/mol

# of Protons = 2 (atomic #)# of Protons = 2 (atomic #)

# of Neutrons = 2 (Mass#- Atomic# # of Neutrons = 2 (Mass#- Atomic#

4.00-2.00= 2.00)4.00-2.00= 2.00)

# of electrons = 2 (atomic #)# of electrons = 2 (atomic #)

                                                 

Diagram on Finding Protons, Diagram on Finding Protons, Neutrons, and ElectronsNeutrons, and Electrons

http://www.http://www.lcusdlcusd.net/.net/lchslchs//jwaltersjwalters/determining.html/determining.html

                                                 

Lets take a QuizLets take a Quiz

The number of protons, neutrons, The number of protons, neutrons, electrons of Magnesium the atom # is 12 electrons of Magnesium the atom # is 12 and the atomic mass is 24.and the atomic mass is 24.

12, 12, 1212, 12, 12

12, 24, 1212, 24, 12

1,2,11,2,1

                                                 

That is an incorrect answerThat is an incorrect answer

The answer to the question was 12,12,12The answer to the question was 12,12,12

Reason:Reason:

Atomic number –12Atomic number –12

Mass number- 24Mass number- 24

Number of neutrons- 12Number of neutrons- 12

Next ?Next ?

Question #2Question #2

How many Protons are in Uranium if it has an How many Protons are in Uranium if it has an atomic number of 92 and an atomic mass of atomic number of 92 and an atomic mass of 238?238?

2382383103109292

                                                 

That is an incorrect answerThat is an incorrect answer

The answer to that question was 92 because The answer to that question was 92 because that is the atomic number of 92 equals the that is the atomic number of 92 equals the number protons.number protons.

Next ?Next ?

Question # 3Question # 3

What is the number of Neutrons of the What is the number of Neutrons of the Element Mercury (Hg) if it has an atomic Element Mercury (Hg) if it has an atomic number of 80 and an atomic mass of 201?number of 80 and an atomic mass of 201?

8080

201201

121121

                                                 

That is an incorrect answerThat is an incorrect answer

For the element of Mercury (Hg) you take For the element of Mercury (Hg) you take the atomic mass which is 201 and subtract the atomic mass which is 201 and subtract from it the atomic number which has a from it the atomic number which has a value of 80.value of 80.

Example:Example:

201- 80= 121201- 80= 121

Next SlideNext Slide

Work ConsultedWork Consulted

http://www.lcusd.net/lchs/jwalters/http://www.lcusd.net/lchs/jwalters/determining.htmldetermining.html

http://www.neutron.anl.gov/hyper-physics/http://www.neutron.anl.gov/hyper-physics/proton.htmlproton.html

http://education.jlab.org/glossary/quark.htmlhttp://education.jlab.org/glossary/quark.html

www-istp.gsfc.nasa.gov/Education/www-istp.gsfc.nasa.gov/Education/welect.htmlwelect.html

                                                 

The EndThe End

This is the end of the tutorial on how to find This is the end of the tutorial on how to find the number of protons, neutrons, and the number of protons, neutrons, and electrons I hope you enjoyed it. electrons I hope you enjoyed it.