CHEM: Periodic table - identification of characteristics
Alkali metals
?
Earth metals
?
Metals
?
Non-metals
?
Halogens
?
Noble gases
?
Alkaline Earth metals
?
Other metals
?
Noble gases
?
Metals
?
Transition metals
?
Non-metals
?
Alkali metals
?
Non-metals
?

Increasing

reactivity

?

Group 1

?
Group 2
?
Electron donors
?

Period 2

?

Most reactive

elements

?

Period 3

?

3 valence electrons

?
5 valence electrons
?
Electron stealers
?

Unreactive -

very stable

?

The symbol

 for this

element =

Total number

of protons =

Number of

valence electrons =

Total number

of electrons =

Neutron
?
Electron orbital
?
Nucleus
?
Electron
?
Proton
?
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