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3 years ago

PLEASE HELP!! URGENT!!

Chemistry

1 answer:

inna [77]3 years ago

5 0

Answer:

Explanation:

Ionic bonds are polar and some covalent bonds are also polar.

it depend upon the electronegativity of bonded atoms. If electronegativity difference of both bonded atoms are greater than 0.4 polar covalent bond is formed. While in case of ionic bond there is huge difference between electronegativity of bonded atoms one with higher electronegativity complete gain the electron from atom with lower electronegativity and ionic bond is formed.

Ionic bond:

It is the bond which is formed by the transfer of electron from one atom to the atom of another element.

Both bonded atoms have very large electronegativity difference. The atom with large electronegativity value accept the electron from other with smaller value of electronegativity.

For example:

Sodium chloride is ionic compound. The electronegativity of chlorine is 3.16 and for sodium is 0.93. There is large difference is present. That's why electron from sodium is transfer to the chlorine. Sodium becomes positive and chlorine becomes negative ion.

Covalent bond:

It is formed by the sharing of electron pair between bonded atoms.

The atom with larger electronegativity attract the electron pair more towards it self and becomes partial negative while the other atom becomes partial positive.

For example:

In water the electronegativity of oxygen is 3.44 and hydrogen is 2.2. That's why electron pair attracted more towards oxygen, thus oxygen becomes partial negative and hydrogen becomes partial positive.

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What is the charge of an atom after it gains an electron during the formation of a bond?

Alex_Xolod [135]

Answer:

D. One negative charge

Explanation:

During the formation of a bond, if an atom gains an electron, after that it will be left with a negative charge compared to the atom before the bond is formed. This is because in these types of bonds, which are ionic bonds, there is a transfer of electrons between atoms, there will be one or more atoms that yield electrons that will be captured by another and other atoms that gain them, and the difference of charges produced by this transfer of electrons, will cause the union to occur due to the attraction between electrostatic forces.

If you have a neutral atom before joining, and it gains an electron to form a bond, it will have one electron more than its initial state (in the initial state, the number of protons and electrons is the same, because the atoms they are electrically neutral), so having an extra electron will make it have a negative charge, since there will be a difference between the number of protons and electrons that the atom possesses. This is why the correct answer is D.

In the case of response A and B, the atom could only remain positively charged if it loses electrons, but as in this case it wins, they are not correct.

The answer C is also not correct because only one electron wins, so that it is left with two negative charges, it should gain two electrons during the bond formation.

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