Which statement below best describes a polar covalent bond? a. Polar covalent bo
ID: 150916 • Letter: W
Question
Which statement below best describes a polar covalent bond?
a. Polar covalent bonds form when two atoms share electrons equally, with electrons spend the same amount of time around each atom and no partial charges are formed.
b. Polar covalent bonds form when two atoms share electrons unequally, with one electron spending more time around one atom than another, the molecule becomes slightly positive on one side and slightly negative on the other giving the molecule opposite charges on two sides
c. Polar covalent bonds form when two atoms share electrons equally, with electrons spend the same amount of time around each atom, the molecule becomes slightly positive on one side and slightly negative on the other, thus making a polar molecule.
Which statement below best describes a non-polar covalent bond?
a. Non-polar covalent bonds form when two atoms share electrons equally, with electrons spend the same amount of time around each atom and no partial charges are formed.
b. Non-polar covalent bonds form when two atoms share electrons unequally, with one electron spending more time around one atom than another, the molecule becomes slightly positive on one side and slightly negative on the other giving the molecule opposite charges on two sides
c. Non-polar covalent bonds form when two atoms share electrons equally, with electrons spend the same amount of time around each atom, the molecule becomes slightly positive on one side and slightly negative on the other, thus making a polar molecule.
Explanation / Answer
Polar covalent bond
Answer- (b)
Polar covalent bond is a type of chemical bond where a pair of electrons is unequally shared between two atoms. In a polar covalent bond , the electrons are not equally shared because one atom spends more time with the electrons than the other atom.
E.g A water molecule H20.
Non-polar covalent bond
Answer- (a)
Non-polar covalent bond is a type of chemical bond where two atoms share a pair of electrons with each other (equally) . A non-polar molecule has no separation of charge so no positive or negative poles are formed.
E.g Bond formed between two hydrogen atoms to form a hydrogen molecule. Methane is also an example of this type of bonding.
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