Periodic Table Trends

Periodic Trends
 Metallic Properties: The properties of the elements change fro metallic to non-metallic going left to right across the periodic table.
The elements become more metallic going down a family in the periodic table.

Atomic Radius
Atomic radii of an atom increases going across a row left to right, it also increases going down a group.
Going left to right across a given period the atomic number (and number of protons) increases, and the positive charge on the nucleus increases.

Ionization Energy: is the energy need to completely remove an electron from an atom. Ionization energy increases going up and to the right. All noble gases have high ionized energy.   Helium has the highest ionization energy while Francium has the lowest.

 Electronegativity:  Is the tendency of an atom to attract electrons from a neighboring atom. Electronegativity energy increases going across a row left to right. It decreases going down a group.

Reactivity: When a metal moves down a row and right it becomes more reactive. Non-metals are the opposite as once they go up a row they become more reactive.

 Melting & Boiling Point: Elements from the centre have a higher boiling point and Noble Gases have

the lowest melting point.