أكاديميا - كولنز - معاجم الجيب العلمية - الكيمياء - انكليزي - فرنسي - عربي الحرف z

Academia - Collins - Pocket Scientific Dictionaries - Chemistry - English - French - Arabic, letter Z


Z

The symbol that represents the atomic number of an element, that is, the number of protons in an atom.


zinc
zinc m

zinc. Transition metal is found in
The first transition series of the periodic table.

Zinc is a dense gray metal that reacts to acids but does not react to cold water. It is used in alloy and brass, as well as in protecting steel by galvanizing. Zinc is extracted from the mineral sphalerite (ZnS) (zinc blende).

zinc compounds
Compositions of zinc

Zinc compounds.

Zinc oxide ZnO

It is used in medicine in the form of zinc oxide ointment, and it is used to protect the skin from irritations, such as villus rashes. It is also used in paints. Zinc oxide is amphoteric, as is zinc hydroxide.

zymase
zymase f

Zimaz. An enzyme found in yeasts is responsible for the formation of ethanol and carbon dioxide from sugars.