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's law Gay-Lussac

Gay Lussac was a French-born scientist, who discovered that when two gases react, the relationship between the volumes of reagents and products are always the same as the relationship between whole numbers.

For example, a volume of hydrogen reacts with chlorine giving a volume of two volumes of hydrochloric acid, according to the reaction:

H + Cl → HCl

Again, two volumes of hydrogen react with oxygen to give a volume of two volumes of water, according to the reaction:

H + O2 → H2O

First Law of Gay Lussac : constant pressure, the volume of a gas increases with ' increasing temperature.

V0 = volume of gas at a temperature of zero degrees Celsius

V (T) = volume to a temperature greater than zero:

Alpha = expansion coefficient of gas (volume increase immediately by a unit volume gas when its temperature rises 1 ° C).

If the temperature is not taken as a reference in degrees centigrade but in degrees Kelvin, the law becomes:

second law Gay Lussac : constant volume the pressure of a gas increases with temperature.

P0 = pressure of a gas at 0 ° C;

P (T) = pressure at a temperature greater than 0 ° C;

Alpha coefficient of expansion of the gas (relative increase of gas pressure when the temperature rises 1 ° C).

If the temperature is in degrees Kelvin, the law becomes:

Both these laws are valid not too high pressures and temperatures close to the liquefaction of gases. It is therefore more occurred when a gas behaves like a perfect (ideal).

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The Periodic Table

The Periodic Table of the elements is a tool that is used to classify the most representative inorganic chemical elements, divided into groups (vertical lines) and periods (horizontal lines). The elements are divided into metals, non metals and metalloids (metals).

I metals elements are widespread, malleable, ductile and can be processed to be cut into smaller sheets. Have a high electrical conductivity, high thermal conductivity and are shiny. Among the metals include sodium (Na), beryllium (Be), Magnesium (Mg), aluminum (Al), potassium (K), iron (Fe), cobalt (Co), copper ( Cu), nickel (Ni) and so on.

I non-metals have properties opposite to metals (low electrical and thermal conductivity, low ductility and malleability). These are elements such as hydrogen (H), sulfur (S), phosphorus (P), nitrogen (N), chlorine (Cl), oxygen (O), etc..

I metalloids still have different properties, which are between metals and non-metals. This is the boron (B), Silicon (Si), arsenic (As), tellurium (Te), germanium (Ge).

The elements of the Periodic Table are (in order of atomic number):

a hydrogen (H)

2 Helium (He)

3 Lithium (Li)

4 Beryllium (Be)

5 Boron (B)

6 Carbon (C)

7 Nitrogen (N)

8 Oxygen (O)

9 Fluorine (F)

10 Neo (Ne)

11 Sodium (Na)

12 Magnesium (Mg)

13 Aluminium (Al)

14 Silicon (Si)

15 Phosphorus (P)

16 Sulphur (S)

17 Chlorine (Cl)

Argo 18 (Ar)

19 Potassium (K)

20 Calcium (Ca)

Scandia 21 (SC)

22 Titanium (Ti)

23 vanadium (V)

24 Chromium (Cr)

25 Manganese (Mn)

26 Iron (Fe)

27 Cobalt (Co)

28 Nickel (Ni)

29 Rame (cu)

30 Zinc (Zn)

Gallio 31 (Ga)

32 Germanium (Ge)

33 Arsenic (As)

34 Selenium (Se)

35 Bromo (Br)

36 Cripto (Kr)

37 Rubidio (Rb)

38 Stronzio (Sr)

39 Ittrio (Y)

40 Zirconio (Zr)

41 Niobio (Nb)

42 Molibdeno (Mo)

43 Tecnezio (Tc)

44 Rutenio (Ru)

45 Rodio (Rh)

46 Palladio (Pd)

47 Argento (Ag)

48 Cadmio (Cd)

49 Indio (In)

Stagno 50 (Sn)

51 antimony (Sb)

Tellurio 52 (tea)

Iodi 53 (I)

54 Xeno (Xe)

55 Cesium ( Cs)

56 Barium (Ba)

Kantanio 57 (A)

58 Cerium (Ce)

59 Praseodymium (Pr)

60 Neodymium (Nd)

Promezio 61 (PM)

62 Samaria (Sm)

63 europium (Eu)

64 Gadolinium (Gd)

65 Terbium (Tb)

66 Dysprosium (Dy)

67 Holmium (Ho)

68 erbium (Er)

69 Thulium (Tm)

70 Ytterbium (Yb)

71 Lutetium (Lu)

72 Hafnium (Hf)

73 Tantalum (Ta)

74 Tungsten (W)

75 Rhenium (Re)

76 Osmium (Os)

77 Iridium (Ir)

78 Platinum (Pt)

79 Gold (Au)

80 Mercurio (Hg)

81 Tallio (Tl)

82 Piombo (Pb)

83 Bismuto (Bi)

84 Polonio (Po)

85 Astato (At)

86 Rado (Rn)

87 Francio (Fr)

88 Radio (Ra)

89 Attinio (Ac)

90 Torio (Th)

91 Protoattinio (Pa)

92 Uranio (U)

93 Nettunio (Np)

94 plutonium (Pu)

95 Americium (Am)

Curio 96 (Cm)

97 Berkelium (Bk)

98 Californium (Cf)

99 Einsteinium (Es )

100 Fermium (Fm)

101 Mendelevium (Md)

102 Nobelium (No)

103 Lawrencium (Lw)

Each element of the table periodical has its own atomic number (top left corner), an atomic weight (in the upper right corner), the symbol (in the case Iron Fe for example), the name immediately below the symbol, and the electronic configuration, data from orbit.

The atomic number indicates the number of protons in the atomic nucleus and is indicated with the letter Z. The atomic weight is the mass of an atom of the element, expressed in atomic mass units. The electronic configuration is the arrangement of electrons around the nucleus of an atom (or more nuclei of atoms).

Here you find the table interactive periodic ! We will return very useful in your studies!

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The surname

The surname is that part of our name which we inherited from birth, an ancient custom dating back to medieval times . Formerly, the name did not exist, but people were identified only by their names. The Romans introduced more names, or even three (praenomen, that is the proper name, the nomen, which identified the immediate family, and ultimately the cognomen). The name of a Roman could be very long, because sometimes you add more names! Over time these customs changed again, and often was called with only a nickname, a personal characteristic signature of the person. With increasing population, the introduction of the name was made necessary in order to better distinguish people from each other. From ' thousand years about the surnames begin to spread, first to the families of the nobility and later the entire population. In 1564, the year of award of Council of Trent , the surname became compulsory and hereditary.

The surname was a characteristic of a person, which could be related to the nature, origin, the family craft and many other things.

There is a very interesting site that allows you, by entering your name, display the presence and distribution of it throughout Italy! Try it, enter your name here

the site you can also order your shirts with your name!