Atomic structure: elements 1 - 20 and beyond

Atomic Structure and electron configuration
Elements 1 to 20 and beyond..

Hydrogen
Electron configuration:
1
H

Helium
Electron configuration:
2
He

Lithium
2, 1
Li

Beryllium
2, 2
Be

Boron
2, 3
B

Carbon
2, 4
C

Nitrogen
2, 5
N

Oxygen
2, 6
O

Fluorine
2, 7
O

Neon
2, 8
O

Sodium
2, 8, 1
Na

Magnesium
Mg

Aluminium
Mg

Silicon
Si

Phosphorus
P

Sulfur
S

Chlorine
Cl

Argon
Ar

Potassium
2, 8, 8, 1
K

Calcium
Ca

Beyond calcium..
Not in syllabus
Electron shell filling follows different rules. Knowledge of electron configuration and drawing of atomic structure NOT required (and do NOT assume!)

Beyond calcium..
All you need to know:
For atoms of all elements in Group I to VII,
number of outermost electrons = group number.
All atoms of Group 0 elements have 8 outermost electrons, except helium atom, which has 2.
Transition metals – not required to know.

If you die die must know, you can..
wait 2 years for JC, OR
see me immediately, OR
go to ptable.com and enjoy the wealth of information there. 

Atomic structure: elements 1 - 20 and beyond

by jallucine

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