Sunday, 25 September 2016
Saturday, 24 September 2016
What is Normality ?
Normality is the ratio of gram equivalent weight to volume of solution in liter.
where gram equivalent is the measure of reactive capacity of molecule consider for normality.
Normality (N) :-
Gram equivalent weight / Volume of the solution in liter.
Unit => N = "eq/L" (equivalent per liter)
Thursday, 8 September 2016
Aufbau PrincipleAccording to this principle in the ground state of the atoms the orbital’s are filled in order of their increasing energies means electrons enter higher energy orbital’s so order in which orbital’s are filled is 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.
Pauli Exclusion Principle
· given by W. Pauli (1926).
· Two electrons in an atoms can’t have same set of 4-quantum no.
· Only two electrons may exist in same orbital and these electrons must have opposite spin.
Hund’s Rule of Maximum Multiplicity
· According to this rule pairing of electron in the orbital’s belonging to the same sub-shell (p, d or f)· Does not take place until each orbital belonging to that sub-shell has got one electron each i.e. it is singly occupied.
Sunday, 4 September 2016
Definition of Nuclear Chemistry- Nuclear chemistry is the branch of chemistry, which deals with the study of changes in the nucleus of an atom, radioactivity and nuclear reactions.
What is Nuclear Chemistry?
Nuclear chemistry is interesting field of chemistry in which we learn how nuclear reactions happens and how different types of changes occurs in nucleus of an atom also we learn about radioactivity and radioactive elements.
Founder of Nuclear Chemistry
Marie Curie was the founder of the nuclear chemistry.
Marie Curie was a physicist and chemist who lead revolutionary research on radioactivity and she won Nobel Prize in the field of radioactivity
What is radioactive substances?Substances which emits radiation by there self are known as radioactive substances.
What is radioactivity?Phenomenon of radioactive substances to emits radiations is known as radioactivity.
What is importance of radioactivity?Radioactive substances (or radioactive isotopes of elements) are useful in many physical and chemical reactions. Useful in determining complex reaction mechanism. Radioactivity have several applications in different fields of science like chemical science, medical science, agriculture fields, industrial fields etc.
Thursday, 1 September 2016
What is Molality?It is the ratio of moles of substance to kilogram of solvent.
Where mole is weight in gram divided by molecular weight.
Molality is chemistry terminology.
Molality (m) :-No. of moles of the solute / Mass of solvent in Kilogram (Kg).
Unit => m = Moles/Kg
|What is Molality|
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