by https://padlet.com/zinahb06/en5ipqmwa6t5 en-us 2017-01-08 18:51:12 UTC 2023-02-07 19:22:14 UTC hello@padlet.com VIDEO zinahb06 https://padlet.com/zinahb06/en5ipqmwa6t5/wish/145872910 https://www.youtube.com/watch?feature=player_embedded&v=99wPiMb-k0o

QUETIONS

1. Which elements are in the same group as zinc? 
2. With what does zinc react easily and what does it produce? 
3. Which is the enzyme that catalyse the reaction between water and carbon monoxide in our body? 
4. Why is zinc a very good quality material for roofs? 
5. Explain briefly how zinc is used for galvanizing iron? ]]> 2017-01-08 19:01:41 UTC https://padlet.com/zinahb06/en5ipqmwa6t5/wish/145872910 PHESICAL AND CHEMICAL PROPERTIES   zinahb06 https://padlet.com/zinahb06/en5ipqmwa6t5/wish/145876265 Name: Zinc 
Symbol: Zn
Atomic number: 30
Atomic mass: 65,38
Number of protons: 30
                    electrons: 30
                    neutrons: 35
melting point: 419.527°C, 787.149°F, 692.677 K.
Boiling point: 907°C, 1665°F, 1180 K
normal phase: Solid
Classification & family: A silvery-white metal ]]> 2017-01-08 19:52:33 UTC https://padlet.com/zinahb06/en5ipqmwa6t5/wish/145876265 IMPORTANT USES AND APPLICATIONS zinahb06 https://padlet.com/zinahb06/en5ipqmwa6t5/wish/146096447

Most zinc is used to galvanise other metals such as iron, to prevent rusting.
Large quantities of zinc are used to produce die-castings, which are important in the automobile, electrical and hardware industries.
It is also used in alloys such as brass, nickel silver and aluminium solder. 
Zinc oxide is widely used in the manufacture of very many products such as paints, rubber, cosmetics, pharmaceuticals, plastics, inks, soaps, batteries, textiles and electrical equipment.
Zinc sulfide is used in making luminous paints, fluorescent lights and x-ray screens. 

]]> 2017-01-09 19:24:23 UTC https://padlet.com/zinahb06/en5ipqmwa6t5/wish/146096447 BIOLOGICAL ROLE zinahb06 https://padlet.com/zinahb06/en5ipqmwa6t5/wish/146109696 Zinc is essential for all living creatures, forming the active site in over 20 metallo-enzymes.
The average human body contains about 2.5 grams and takes in about 15 milligrams per day.
Some foods have above average levels of zinc, including herring, beef, lamb, sunflower seeds and cheese. ]]> 2017-01-09 20:07:11 UTC https://padlet.com/zinahb06/en5ipqmwa6t5/wish/146109696 zinahb06 https://padlet.com/zinahb06/en5ipqmwa6t5/wish/146119626 2017-01-09 20:45:03 UTC https://padlet.com/zinahb06/en5ipqmwa6t5/wish/146119626 zinahb06 https://padlet.com/zinahb06/en5ipqmwa6t5/wish/147141318 2017-01-13 19:42:22 UTC https://padlet.com/zinahb06/en5ipqmwa6t5/wish/147141318