Parts Of An Atom Flashcards
1
Q
Electrons
A
Negative
In Clouds
0 amu
1/2000 of a proton
2
Q
Neutron
A
Neutral All are identical 1 amu Chadwick In the Nucleus
3
Q
Protons
A
Rutherford, Thomson Positive All are identical P + In the Nucleus
4
Q
Ions
A
Atoms with missing electrons
5
Q
Atomic Number
A
Number of protons
NEVER CHANGES
6
Q
Mass number
A
The mass number is the sum of the protons and neutrons in the atom
7
Q
Atomic Mass Unit
A
Weight, Average of all isotopes in the element
