Periodic Trends

So what are periodic trends?
They are progress of increasing or decreasing with the charactierstics of certain elements.

They're are a lot of trends and we must know them all:
1)Metallic Properties
2)Atomic Radius
3)Ionization Energy
4)Electronegativity
5) Reactivity
6)Ion Cahrge
7) Melting and Boiling Point
8) Density

Here are some of the trends...let's start of with...
Metallic Properties

The elements change from left to right arosss the table and elelements that are more metallic moves down the table.

Atomic Radius:

The atom decreases aross a row from left to right and increases going down a family. When the atom is going from left to right the atomic number increases along with the nucleus.
When the atoms are going down a family the orbits are more compact and therefore the inner electons attract each other whereas the elctrons on th outer end repel each other.

Reactivity:

Metals and Non-metals have and show different trends. When ther metal moves down a family and right a row it is more reactive and when going up and left it is less reactive.
Non-metals are the opposite or metals, it increases or it's more reactive as an atom goes up a family.

Melting and Boiling Point:

The elements from the center has the highest melting point and the Noble Gases has the lowest melting point.

Ionization Energy:

Ionization Energy are enegies needed to remove one elctron from an atom. They increase as it does up and right in t he periodic table and all the noble gases have high ionization energy. The elctrons have these atoms remove eaily. When going left to right it has a higher attraction between the nucleus and the elctrons whereas the outer electrons decreases as it goes down a group.

Electronegativity:

Electornegativity is how much atom wants to gain electrons. When the atoms goes left to right and up they increase and decreases going down a group Atoms with high electornegativity are strognly attracts other elctrons from another atom or it may remove an electron from a neighbor.