Group 1 (IA) Element - Hydrogen Summary
Summary - Hydrogen is the most abundant element in the universe. Hydrogen is also the lightest element in the universe. It has a vapour density of 1, which is 14.4 times lighter than air. Hydrogen is absent in the free state in the earth's atmosphere. But in the combined state i..
Modern Periodic Table-Long Form Periodic Table of Elements
Later, Henry Gywn-Jeffreys Moseley showed that the atomic number of an element is numerically equal to the number of electrons round the nucleus. The number of electrons in turn is equal to the number of protons in the nucleus. He suggested that atomic number is a more fundamental proper..
Later, Henry Gywn-Jeffreys Moseley showed that the atomic number of an element is numerically equal to the number of electrons round the nucleus. The number of electrons in turn is equal to the number of protons in the nucleus. He suggested that atomic number is a more fundamental proper..The number of subsets 'c' of a set containing n elements is given by ..
The number of subsets ' c ' of a set containing n elements is given by c = 2 n . Find the number of elements in the original set which has 2048 subsets. => 11 or 1024 or 2048 or 2 2 0 4 8..
Modern Atomic Theory
In view of new discoveries about atoms, Dalton's atomic theory was modified as given below: * Atom is no longer indivisible as it has a complex structure of sub atomic particles (electrons, protons and neutrons). * Atoms of the same element may posses different r..
Modern Atomic Theory
In view of new discoveries about atoms, Dalton's atomic theory was modified as given below: Atom is no longer indivisible as it has a complex structure of sub atomic particles (electrons, protons and neutrons). Atoms of the same element may posses different relative masses (..
Example:
Cl - 35.5Cu - 63.5The fractional atomic masses of elements are due to the existence of isotopes having different mass..
Artificial Nuclear Reactions
Thus this phenomenon in which artificial transmutation of a stable non - radioactive nucleus leads to the formation of radioactive isotope is called artificial radioactivity or induced radioactivity. Some of the isotopes produced as a result of neutron bombardment find applicati..
Thus this phenomenon in which artificial transmutation of a stable non - radioactive nucleus leads to the formation of radioactive isotope is called artificial radioactivity or induced radioactivity. Some of the isotopes produced as a result of neutron bombardment find applicati..Example
Cl - 35.5 Cu = 63.5 The fractional atomic masses of elements are due to the existence of isotopes having different masse..
Radioactivity
The phenomenon of spontaneous disintegration of an unstable nucleus of naturally occurring isotope accompanied by emission of active radiations line a , b and g radiations is known as Natural Radioactivity. These radiations come from the breakup of the central core or nuclei of heav..
Solution of triangles
From geometry, we know that when any three elements are given of which necessarily a side is given, the triangle is completely determined i.e, remaining three elements can be determined. The process of determining the unknown elements knowing ..
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