Lesson 11: Trends on the Periodic Table
> elements close to each other on periodic table display similar characteristics
> 7 important periodic trends:
1. Reactivity
> 7 important periodic trends:
1. Reactivity
2. Ion Charge
3. Melting Point
4. Atomic Radius
5. Ionization Energy
6. Electronegativity
7. Density *
Reactivity
> metals and non-metals show different trends
> most reactive metal is Francium; most reactive non-metal is Fluorine
Ion Charge
> elements' ion charges depend on their group (column)
Melting Point
> elements of the highest melting point in center of table
> noble gases have the lowest melting points
> starting from left to right, melting point increases (until middle of table)
Atomic Radius
> radius decrease to the up and the right
> Helium has the smallest atomic radius
> Francium has the largest atomic radius
Ionization Energy
> the energy needed to completely remove an electron from an atom
> increases going up and to the right
> all noble gases have HIGH ionization energy
> Helium has highest ionization energy
> Francium has lowest ionization energy
> OPPOSITE trend from atomic radius
Electro Negativity
> refers to how much atoms want to gain electrons
> same trend as ionization energy
And in more recent news...
THIS JUST IN: NEW GROUND-BREAKING
PHYSICS DISCOVERY
~ kim nipp
posted by chemistry11 @ 8:30 PM
1 Comments:
Hahaha. I like the hotdog periodic table!
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