ElemantalNotation Flashcards
1
Q
Atomic Number
A
Repersents the number of Protons in the nucleus and identifies each element
2
Q
Mass number
A
Sum or protons and neutrons in nucleus
3
Q
Isotopes
A
The same atoms with diferent numbers of neutrons and therefore diferent mass numbers
4
Q
Groups
A
Verticle colums, there are 18
Tell # of electrons in outer shell
5
Q
Periods
A
Horazontal rows
7 total
Give info about # of shells
period 2=2shells ect