1.15 Arrangement Electrons
The arrangement of electrons:
Electrons orbit the nucleus
They are arranged in regions called 'shells' which are positioned a fixed distance from the nucleus.
First shell - 2 electrons
Second shell - 8 electrons
Third shell - 8 electrons
Group no. = electrons in outer shell
Period no. = no. of occupied shells
Electronic Configuration
e.g.
2,1
2,7
Electrons orbit the nucleus
They are arranged in regions called 'shells' which are positioned a fixed distance from the nucleus.
First shell - 2 electrons
Second shell - 8 electrons
Third shell - 8 electrons
Group no. = electrons in outer shell
Period no. = no. of occupied shells
Electronic Configuration
e.g.
2,1 2,7
Comments
Post a Comment