Why does the periodic table look like this?

1. H H e Be B C N O F Ne Li Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Ti Pb Bi Po At Rn Fr Ra Ac Rf Ha PT Why does the periodic table look like this?

2. The Periodic Table of Elements has the design it does because • the elements in the table have common properties and • the structure of atoms making up the elements have common characteristics.

3. vertical columns are called Groups and demonstrate several common trends. Groups Atoms increase in size descending through a group Atoms in a group have same number of valence electrons so they behave similarly

4. Many groups have special names that describe their characteristics: Alkali Metals Alkaline Earth Metals Transition Metals Halogens Noble Gases

5. Horizontal rows are called Periods and demonstrate trends as well. Periods Atoms increase in size ascending through a period Atoms in a period have the same number of electron shells

6. The Periodic Table is broken into three basic categories of elements: Metals Nonmetals Metalloids

7. The table also gives you details about specific elements. 47 Ag Silver 107.87 Atomic Number Symbol Name Atomic Mass