Tends on the periodic table

-Elements close to each other on the periodic table displays similar characteristics
-There are 7 important periodic trends:
1. Reactivity
- metals and non-metals show diffrent trends
- the most reactive metal is Francium; the most reactive non metal is Flourine
2. Ion charge
-element ion charge depends on their group name

3. Melting point
1. Elements in the center of the table of the highest melting point
- noble gases have the lowest melting points
- starting from the left and moving right, melting point increases(until middle of the table)
4.Atomic Radius
- radius decrease as you love to the upper right
- Helium has the smallest radius
- Francium has the biggest radius
5. Ionization energy
- ionization energy is the energy needed to completely remove an electron from an atom
- it increases going up and to the right
- all noble gases have high ionization energy
- Helium has the highest ionization energy
- Francium has the lowest ionization energy
- opposite trend from atomic radius
6. Electronegativity
- electronegativity refers to how much atoms want to gain electrons
- follows the same trend as ionization energy
7. Density (not taught during class)


-Paul Dinh