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(i) Metallic sodium into gaseous sodium atom
The energy required per mole of sodium is 'enthalpy of sublimation' which is represented by ( Hs). This step is energy consuming process...
The energy required per mole of sodium is 'enthalpy of sublimation' which is represented by ( Hs). This step is energy consuming process...Atomicity
Hydrogen is diatomic (H 2 ) whereas alkali metals are monoatomi..
Atomic Hydrogen
Langmuir ,in 1915, obtained atomic hydrogen by dissociating on a hot filament of tungsten or platinum. The dissociation of molecular hydrogen is an endothermic process. The atomic hydrogen is stable only for a fraction of a second and immediately reverts back to its molecular..
Langmuir ,in 1915, obtained atomic hydrogen by dissociating on a hot filament of tungsten or platinum. The dissociation of molecular hydrogen is an endothermic process. The atomic hydrogen is stable only for a fraction of a second and immediately reverts back to its molecular..Hardness of metals
The hardness of metals is due to the strength of the metallic bond. In general, the strength of a metallic bond depends upon: The greater the number of valence electrons for delocalisation the stronger is the metallic bond. Smaller the size of the kerne..
Structure of the Atom
>The mass of electrons is negligible compared to the mass of the protons. Ordinary hydrogen is the only element that has no neutron in it. According to Bohr electrons revolve around the nucleus in fixed orbits called K, L, M, N etc. The energy of the shells increases as the distance form the nucleu..
Relation Between Atomic Number and Atomic Mass
Relation Between Atomic Number and Atomic Mass - While studying the periodic table, it will be noticed that with the increase in the atomic number, there is an increase in atomic mass as well (with some exceptions). Usually an element with high atomic..
Relation Between Atomic Number and Atomic Mass - While studying the periodic table, it will be noticed that with the increase in the atomic number, there is an increase in atomic mass as well (with some exceptions). Usually an element with high atomic..Relation Between Atomic Number and Atomic Mass While studying the periodic table, it will be noticed that with the increase in the atomic number, there is an increase in atomic mass as well (with some exceptions). Usually an element with high atomic number has high atomic mass as well. If you recall from ..
While studying the periodic table, it will be noticed that with the increase in the atomic number, there is an increase in atomic mass as well (with some exceptions). Usually an element with high atomic number has high atomic mass as well. If you recall from ..Conduction in Metals
fig 1.22 - Overlapping of s and p bands in group II elements Metals are extreme examples of delocalized electrons. In a metallic crystal the electrons are free to move throughout the crystal. However, the metal ions are fixed in position and can only vibrate. When a ..
Corrosion of Metals
Corrosion of Metals - We have learnt that metals that are chemically active get corroded in the presence of a moist atmosphere. Corrosion is an oxidation reaction with atmospheric oxygen in the presence of water on the surface of a metal. Iron corrodes more quickly tha..
Corrosion of Metals - We have learnt that metals that are chemically active get corroded in the presence of a moist atmosphere. Corrosion is an oxidation reaction with atmospheric oxygen in the presence of water on the surface of a metal. Iron corrodes more quickly tha..Reaction with metals
. They do not turn blue litmus to red but treated with active metals liberate hydrogen. The acidic character of alcohols is due to the presence of polar O-H group. Due to greater electro negativity of oxygen atom, the shared pair between O and H is drawn towards the oxygen ..
. They do not turn blue litmus to red but treated with active metals liberate hydrogen. The acidic character of alcohols is due to the presence of polar O-H group. Due to greater electro negativity of oxygen atom, the shared pair between O and H is drawn towards the oxygen ..See what our Users say :
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