THE PERIODIC TABLE

History of PeriodicTable

Dmitri Mendeleev, a Russian chemist, was the first scientist to make a periodic table much like the one we use today. Mendeleev arranged the elements in a table ordered by atomic weight, corresponding to relative molar mass as defined today. It is sometimes said that he played "chemical solitaire" on long train journeys using cards with various facts of known elements.[10] On March 6, 1869, a formal presentation was made to the Russian Chemical Society, entitled The Dependence Between the Properties of the Atomic Weights of the Elements. His table was published in an obscure Russian journal but quickly republished in a German journal, Zeitschrift für Chemie (Eng., "Chemistry Magazine"), in 1869.

Describe the Periodic Table

The periodic table is a chemistry reference  

It arranges all the known elements in an informative grid 

Describe the Periodic Table

Elements are arranged left to right and top to bottom in order of increasing atomic number

This order usually coincides with increasing atomic mass

Describe the Periodic Table

The Table's pattern and arrangement shows the arrangement of electrons in the atom.

Elements have different atomic numbers - the number of protons or electrons increases up the table as electrons fill the shells.

Describe the Periodic Table

Elements have different atomic masses - the number of protons plus neutrons increases up the table.

Rows - elements of each row have the same number of energy levels (shells).

Columns - elements have the same number of electrons in the outermost energy level or shell (one to eight).

Describe the Periodic Table

The different rows of elements are called periods.  The period number of an element signifies

the highest energy level an electron in that element occupies

The different columns of elements are called groups or families Elements in the same family have similar

properties

Describe the Periodic Table

Describe How To Read The Periodic Table

Describe how to read the periodic table: Every table has:

Describe how to read the periodic table:

Atomic Number

The number of protons in an atom identifies the element. 

  The number of protons in an atom is referred to as the atomic number of that element.

Describe how to read the periodic table:

Atomic Symbol:The atomic symbol is one or two letters chosen to represent an element ("H" for "hydrogen," etc.). 

These symbols are used every where in the world

  Usually, a symbol is the abbreviation of the element or the abbreviated Latin name of the element.

Describe how to read the periodic table:

Atomic Mass:The atomic mass is the average mass of an element in atomic mass units ("amu"). 

Though individual atoms always have a whole number of amus, the atomic mass on the periodic table is shown as a decimal number because it is an average of all the isotopes of an element.

http://www.chemicalelements.com/

REFERENCEShttp://www.chemsoc.org/viselements/pages/periodic_table.html

REVIEW THE PERIODIC TABLE WITH THE PERIODIC TABLE ADVENTURE:

http://web.buddyproject.org/web017/web017/

Reference……………..http://science.pppst.com/