SUBATOMIC PARTICLES

Three types of subatomic particles:

-                                                -       &                                         -

Particle

Symbol

Charge

Location

Mass (kg)

Mass (amu)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Parts of the atom:

- NUCLEUS:  accounts for

- ELECTRON CLOUD:    accounts for

 

WEIGHING ATOMS

ISOTOPES:

NUCLIDE:

To differentiate between the different nuclides, there are several different notations that are used:
                AZ E                   A E                    Element - A
A = mass number
Z = atomic number
E = symbol for element
"Element" = name of element

Mass number = number of protons plus the number of neutrons in the nucleus of that nuclide
                    = will always be a WHOLE number
                    = rounded decimal number on Periodic Table is the mass number of the MOST
                        COMMON isotope - not ALL isotopes of that element!

Atomic number = number of protons in the nucleus
                       = whole number on the Periodic Table

So,  if mass number = # of protons + # of neutrons, and atomic number = # of protons...

then # of neutrons =

 

Back to the Unit 3 Notes Page

Back to the Unit 3 Page

Back to the Main Page