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At room temperature, carbon disulfide is a liquid and therefore quite a bit more dense ('heavier') than air. Even at temperatures where carbon disulfide is a gas, it's considerably more dense than air at the same temperature and pressure. The density of a gas is more or less proportional to its molar mass; for carbon disulfide this is 76 while air is mostly nitrogen (28) and oxygen (32).
Nitrogen is a diatomic gas at room temperature. These nitrogen atoms are bond by a triple bond. It needs more energy to break this bond. So nitrogen is less reactive.
The cause of polarity of a covalent bond is the difference in electronegativity between the atoms being bonded. The more electronegative atom involved in the bond attracts the electrons more than the less electronegative. If you want to know the reason for electronegativity then follow the link.
Nonpolar covalent bonds: Equal sharing of the bond electrons, because electronegativities of the two atoms are equal. Polar Covalent Bond: A bond where the electron pair is displaced toward the more electronegative atom. This more electronegative atom obtains a partial-negative charge while the less electronegative atom has a partial-positive charge
Answer The larger the difference in electronegativity the more ionic properties a bond is said to have. The smaller the difference in electronegativity the more covalent properties a bond is said to have The magic number is 1.7 , if electronegativity (EN) difference is less than 1.7 then it is covalent. if it is more, then its ionic bond.
Stabilizing selection results in less genetic diversity in a population.
carbon disulfide
At room temperature, carbon disulfide is a liquid and therefore quite a bit more dense ('heavier') than air. Even at temperatures where carbon disulfide is a gas, it's considerably more dense than air at the same temperature and pressure. The density of a gas is more or less proportional to its molar mass; for carbon disulfide this is 76 while air is mostly nitrogen (28) and oxygen (32).
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A polar covalent bond.
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Because the double bond between nitrogen is very strong
The strongest electron shared bond is the covalent bond. The covalent bond is much more stronger than a single bond but it is also much less stable.
due to more bond energy
Nitrogen is a diatomic gas at room temperature. These nitrogen atoms are bond by a triple bond. It needs more energy to break this bond. So nitrogen is less reactive.