Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
Chemical bonding : The present matter of earth contains atoms bound in groups of two or more called molecules. Their binding capacity is called chemical reactivity; It depends upon the number of electrons in their outermost shell. When the number of shells is more than one maximum seven the first shell nearest to the nucleus can have maximum two electrons the second one can have maximum 8,third one as many as 18 fourth 32,fifth 32,sixth 18and seventh only two. Whichever it may be the outermost shell can never have more than 8electrons.Thus the presence of 8 electrons in the outermost shell represents the stability of an atom. In chemical bonding, the reactive atoms tend to gain stability either by covalent bonds electrons of their outermost shells, or by transferring ionic or electrovalent bonds electrons from one to the other. For instance, a molecule of water is formed by covalent bonding of two hydrogen atoms with an atom of oxygen atom has two electron shells. That of hydrogen atom has a single electron instead of the maximum two it can have. Similarly, the outermost shell of oxygen has only 6 electrons instead of 8 it can have. Obviously, an oxygen atom binds with two hydrogen atoms to complete the electron the electron number of8 in its outermost shell, while each hydrogen atom completes the number of two electrons in its shell, all by mutual sharing.
In another example, an atom of sodium combines with an atom of chlorine to form common salt (NaCI) sodium atom contains 11 electrons in 3 shells (2,8,1,) Chlorine atom contains 17 electrons in 3 shells(2,8,7,) To gain stability, chlorine atom takes up the lone electron of the outermost shell of sodium atom, while the latter easily loses this shell. Thus due to change in their electrons both atoms become electrically charged ions. Losing of an electrons by an atomic such electrovalent bonding is called its oxidation, and gaining of an electron by an atom is called its reduction.
Q. Protein Requirement in chronic diarrhoea? Requirements are increased only in chronic diarrhoea because of associated tissue depletion. An additional 10 g of protein may be r
Stages of Aerobic Respiration: Glycolysis (cytoplasm) Process 2ATP used for Glucose -> Fructose 1,6 bisphosphate Fructose splits into G3P and DHAP. DHAP
Discuss why humans not evolve with one central repository of DNA rather than having it replicated throughout the body?
Temperate deciduous forest - Ecosystem The temperate forests are characterised by a moderate climate and broad-leafed deciduous trees, which shed their leaves in fall, are bar
Where do the two neuronal pathways diverge For both the neuronal pathways i.e. light reflex and near reflex the efferent fibres go to are 3rd cranial nerve and then to sphinct
secretary tapetum
Presence and Constancy - Synthetic Characters Presence and constancy refer to how uniformly a species occurs in different stands in a community. For example, when a species is
Transmissible gastroenteritis of swine The disease, first reported from the USA in 1964, is caused by antigenic group 1 mamalian coronavirus, a member of genus Coronavirus of
Q. What are Diastolic Compressive Forces? Coronary perfusion pressure equal to pressure gradient between the coronary arteries and the pressure in LV in diastole. When coronary
When the chromosomes are depleted of histones they are seem to have a central fibrous 'protein scaffold' or nuclear matrix to which the DNA is attached in loops. Therefo
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +1-415-670-9521
Phone: +1-415-670-9521
Email: info@expertsmind.com
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd