METALS

  

METAL

An elementry substance,as sodiun, calcium, or copper, where oxide or hydroxide are basic rather than properties of acadics. comparation with the non metolliads and non metals, no basic line can be drawn between the metals and non metals, and some are beeing part taken of both acids and basic qualities of chromimum, manganes, bismuth ect metals are formed from ores, ores are taken from mines after minning. while in the process of development in metallurgy as od up date we know nearly 84no of metals. before 19th century only humans have discovered 24 metals                                       GOLD        6000BC

                                                       COPPER   4200BC

                                                      

LEAD        3500BC

TIN           1750BC

IRON         1500BC

MERCURY   750BC

                             12NO METALS WERE IN USE ON OR BEFORE IN 18TH CENTURY

GOLD, SILVER, PLATINUM,   

COPPER, IRON, LEAD,                                 

TIN, MERCURY, ANTIMONY,                                                                                          

ZINC, ARSENIC, BISMUTH.

                            METELS DISCOVERED IN 19TH CENTURY

NIOBIUM              CERIUM           RUTHENIUM    SAMARIUM

TANTALUM           LITHIUM          CESIUM           GADALINIUM

IRIDIUM,               CADMIUM        RUBIDIUM        PRASEODYNIUM

PALLADIUM          SELENIUM       THALLIUM       NEPDYNIUM

POTASSIUM          ALUMINIUM     INDIUM            GERMANIUM

SODIUM                THORIUM         GALLIUM         POLONIUM

BORON                  VANADIUM       HOLMIUM        RADIUM

BARIUM                 LANTHANUM    DYSPROSIUM  ACTINIUM

CALCIUM               ERBIUM            THULIUM

MAGNESIUM          TERBIUM          SCANDIUM       

                             20TH CMETALS DISCOVERED AND IN USE FROM ENTURY

EUROPIUM                               TRANSURANIUM ELEMENTS    MENDELEVIUM

LUTETIUM                                 NEPTUNIUM                             NOBELIUM

PROTACTINIUM                         CURIUM                                   LAWRENCIUM

HAFNIUM                                   AMERCIUM

RHENIUM                                   BERLELIUM

TECHNETIUM                             CALIFORNIUM

FRANCIUM                                 EINSTEINIUM

PROMETHIUM                            FERMIUM                           

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