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Class 12 Tuition > Learn Class XI-XII Tuition (PUC) > What is chemical bond? Do you know about polarisability...
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What is chemical bond? Do you know about polarisability?

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When two oppositely charged ions (say A+ and B- ) approach each other the positive ion attracts electrons on the outermost shell of the anion and repels its positively charged nucleus. This results in the distortion,deformation or polarization of the anion. If the polarization is quite small, an ionic...
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When two oppositely charged ions (say A+ and B- ) approach each other the positive ion attracts electrons on the outermost shell of the anion and repels its positively charged nucleus. This results in the distortion,deformation or polarization of the anion. If the polarization is quite small, an ionic bond is formed, while if the degree of polarization is large, a covalent bond results. Thus the power of an ion (cation) to distort the other ion is known as its polarization power and the tendency of the ion(anion) to get polarized by the other ion is known as its polarisability. Greater the polarization power or polarisability of an ion, greater will be its tendency to form a covalent bond. read less
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Physics Tutor with 8 years tutoring experience

Chemical bond is the combination of electrons between two different chemical elements. It may be single, double or triple bond depending upon the applications. Polarisablity means having (+) or (-) ions in it.
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Bond exist due to force between similar or different atom. Polarisation or covalent character occurs because of charge or size
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Masters from University of Hyderabad

Chemical bond is formed by means of attraction between two oppositely charged atoms or sharing of electrons by two atoms in a molecule or by donating a pair of electrons to another atoms. which leads to formation of ionic or pi/sigma(covalent bond) or co ordination bonds.
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Masters from University of Hyderabad

Attraction of oppositely charged atoms or molecules and repulsion of similar charged atoms or molecules by means of electrons around the nucleus of an atoms. number of electrons in outer shell of an atoms decides the charge of an atom by means of electro positivity or electro negitivity.
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Attraction of oppositely charged atoms or molecules and repulsion of similar charged atoms or molecules by means of electrons around the nucleus of an atoms.
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Chemistry Master

Chemical bonding is attraction between the atoms or ions to form new substances. Chemical change always results in new substances. Polarisability is defined as distortion resulted in an electron cloud by the influence of any external force.
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4G high tech point

A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between opposite charges, either between electrons and nuclei, or as the result of a dipole attraction.
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Btech from BITS, MBA from IIT

Chemical bonds are electrostatic forces between two or more atoms which keep the substance intact. These forces are basically forces of attraction between the positive and the negative charged particles. Polarization is the ability of any substance to have distinct charge separation based on its environment....
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Chemical bonds are electrostatic forces between two or more atoms which keep the substance intact. These forces are basically forces of attraction between the positive and the negative charged particles. Polarization is the ability of any substance to have distinct charge separation based on its environment. For example an iron rod when brought closer to a positive charge will induce a negative charge at the nearer end and a positive charge at the farther end thus bringing about polarization. read less
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The legend in education behind every high achiever

The force of attraction between the atoms of the substances are classified into covalent and electrovalent bonds Orientation of the charges of an atom towards its ends is called polarisibility
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Dear friends, Please correct me in case I am wrong. I your opinion , what should be the maximum number of students in a coaching class, so that each student can have maximum dedicated time from the attending teacher in the classroom. In present days, cost and time of coaching / tuition matters a lot . The same will be demontrated by the following two examples : Example 1 : Suppose a student pays Rs. 4000/= per month ( 26 days in a month , excluding Sundays ), One hour per day , number of student is only one, then cost of coaching per minute works out to (Rs. 4000/=X 1 Student )/(26 days X 60 min/day ) = Rs.2.56 per min. cost and he will get dedicated time of 60 min. each day to carry on his studies. Example - 2 : Suppose a student pays Rs. 2000/= per month ( 26 days in a month , excluding Sundays ), One hour per day , number of student is 30 in a class, then cost of coaching per minute works out to (Rs. 2000/=X 30 Students in a coaching class ) / (26 days X 60 min/day ) = Rs.38.46 per min. cost and he will get dedicated time of only two min. each day for his studies. The above examples shows that though the monthly fees paid by each student is just half ( Rs. 2000/= see example -2 ) in case of classroom type of coaching as compared to the individual coaching ( Rs. 4000/= see example - 1 ), but on the other side cost of coaching per min. based on true dedicated time is 15 times higher in case of classroom type coaching with mass students than single student coaching. These can be however extrapolated for any number of students in a coaching class. As a result the speed of learning process of a student will be about fifteen times slower in classroom type coaching having mass students in a class ignoring the other factors. However, it may be the choice of the students and parents which option is better for them ? Regards, Sudhansu bhushan Roy.
Sir your calculations are excellent. I would like to add few things. 1. It depends on the student / parents choice at the end. 2. It never implies that effective attention to a student is 2-3 mins, so...
Sudhansu Bhushan R.
I f presence of H atom makes an organic compound acidic ,then why is methane having 4 H atoms not acid while formic acid with only 2 H atom is acid?
Mere presence of hydrogen atom doesn't make substance acidic, that hydrogen must be ionizable means substance should be able to loose H ATOM as H+ ion and this in turn depends upon the nature of the bond....
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