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Some elements of the periodic table
Some elements of the periodic table
Co
Co
1735 Swedish mineralogist Georg Brandt
1735 Swedish mineralogist Georg Brandt
physical properties
physical properties
chemical properties
chemical properties
biological function
biological function
Ni
Ni
1751 swedish mineralogist Cronstedt
1751 swedish mineralogist Cronstedt
physical properties
physical properties
chemical properties
chemical properties
biological function
biological function
Hf
Hf
history of discovery
history of discovery
physical properties
physical properties
chemical properties
chemical properties
not installed
not installed
He
He
history of discovery
history of discovery
physical properties
physical properties
inert gas
inert gas
biological function
biological function
you have viewed the presentation of some chemical elements
you have viewed the presentation of some chemical elements
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Periodic table of elements

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1Some elements of the periodic table. 12Hf.
2Co. 13history of discovery. 1923 French chemist Jean Urbain Danish
31735 Swedish mineralogist Georg Brandt. history of chemist: Dirk Coster and Georg de Hevesy.
discovery. 14physical properties. silvery-white, having a surface with a
4physical properties. hard metal exists in two versions bright luster is not fading At ordinary temperatures it has a
melting point of 1494 ° C ferromagnetic material. hexagonal lattice Density = 13.09 g/cm3 (20 ° C) refractory
5chemical properties. 2Co + O2 = 2CoO. Co + Br2 = CoBr2. 2Co metal, its melting temperature = 2222 ° C One of the rare
+ N2 = 2CoN. 3Co + C = Co3C. 2Co + 8CO = Co2(CO)8. Co + 2H2SO4 = natural isotopes of hafnium, 174Hf, exhibits a weak alpha
CoSO4 + SO2 + 2H2O. activity (half-life of 2.1015 years).
6biological function. Vital for the body trace element. It is 15chemical properties. Other reactions that occur under the
a part of vitamin B12 (cobalamin). It is involved in blood influence of very high temperatures and in practice. It also
formation, function of the nervous system and liver, enzymatic remains unclear their mechanism. Hf + 2F2 = HfF4.
reactions. The human need for cobalt 0,007-0,015 mg daily. In 16not installed. biological function.
the absence of cobalt akobaltoz develops. 17He.
7Ni. 18history of discovery. August 18, 1868 French scientist
81751 swedish mineralogist Cronstedt. history of discovery. Pierre Janssen. October 20, 1868 English astronomer Norman
9physical properties. silver-white metal does not tarnish in Lockyer.
air Has a face-centered cubic lattice In its pure form is very 19physical properties. practically inert chemical element.
plastic and easy to work pressure. Density (at n. Y.) = 8.902 g nontoxic is colorless, odorless and tasteless Under normal
/ cm ? Melting point = 1726 K. conditions - monatomic gas Its boiling point (T = 4,215 K for
10chemical properties. 2Ni + O2 = 2NiO. Ni + Cl2 = NiCl2. 3Ni 4He) the lowest of all the simple substances.
+ N2 = Ni3N2. 2Ni + B = Ni2B. Ni + 4HNO3 = Ni(NO3)2 + 2NO2 + 20inert gas. chemical properties.
2H2O. Ni + CuSO4 = NiSO4 + Cu. Ni + 4CO = Ni(CO)4. 21biological function. At the moment, the biological role is
11biological function. It is one of trace elements necessary not clear.
for the normal development of living organisms. It takes part in 22you have viewed the presentation of some chemical elements.
enzymatic reactions in animals and plants. In the body, it Slides prepared for you Kobets TimoPhEy, Department of
accumulates in animal dead skin tissues, especially in the Chemistry, the group “MXO-12"
feathers.
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«Periodic table of elements» - Vital for the body trace element. 2Co + N2 = 2CoN. Co + Br2 = CoBr2. not installed. Density (at n. Y.) = 8.902 g / cm ? Melting point = 1726 K. Co + 2H2SO4 = CoSO4 + SO2 + 2H2O. 1751 swedish mineralogist Cronstedt. 2Ni + B = Ni2B. In the absence of cobalt akobaltoz develops. history of discovery. August 18, 1868 French scientist Pierre Janssen.

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