THE INTRODUCE OF ELEMENT ZN

THE DISCOVER OF ZN

• Zn was used to compose brass in China, 10 to 11th century
• Some people think Zn was first abstracted by a Flemish scientist called
• Moras de Respour
• But a lot of European think Zn was abstracted by a Germany scientist
• called Andreas Marggraf at first

ZN'S PROPERTIES

• It's in groups12, periods4 a lightgray metal
• Melting point: 419.5 Celsius Degrees
• Boiling point: 907 Celsius Degrees
• Electron configuration:1s2 2s2 2p6 3s2 3p6 3d10 4s2

COMMON REACTION

• 2 Zn + O2 → 2 ZnO
• Zn + H2O(g)→ ZnO + H2
• Zn+2NaOH+2H2O→ Na2[Zn(OH)4]+H2↑

WHAT'S ZN USED TODAY

• 1.It's used to make penny in US before
• but nowadays, because of the increase price of zn-
• --penny was made by brass but not unmixed Zn( 20% Zn and 80% Cu)
• 2.Zn is used to prevent atmospheric corrosion
• 3.Zn is one of the material to make battery.

ZN IN OUR BODY

• Zn is known as a kind of microelement
• we have 0.003% Zn in our body,most of them stay in skeleton and muscle
• others flow with our blood.
• If we don't have enough Zn, we will be nausea, have a fever or become-
• -high blood pressure