If the atoms that are bonding have identical electronegativities, then it's a completely nonpolar covalent bond. This doesn't happen in the real world unless the two atoms are of the same element. In a practical sense, any two elements with an electronegativity difference less than 0.3 is considered to be nonpolar covalent.
As the difference between the atoms increases, the covalent bond becomes increasingly polar. At a polarity difference of 1.7 (this changes depending on who you ask) we consider it no longer to be a covalent bond and to be the electrostatic interactions characteristic in an ionic compound.
Just so you know, you shouldn't take these values as exact. ALL interactions between adjacent atoms involve some sharing of electrons, no matter how big the difference in electronegativity. Sure, you wouldn't expect much sharing in KF, but there's a little sharing of electrons anyway. There's certainly no big cutoff that happens at a difference of 1.7 Pauling Electronegativity units.
The carrying capacity would *decrease*, as there are less plants for organisms to eat.
Permian Extinction: The Permian - Triassic extinction event, colloquially known as the Great Dying or the Great Permian Extinction, occurred about 252 million years ago, forming the boundary between the Permian and Triassic geological periods, as well as the Paleozoic and Mesozoic eras.
Hope this helps!!(:
Answer:
True
Explanation:
Phnacetin can be produced using Williamson-ether synthesis. In this, phenacetin is derived from acetaminophen and the reaction involve interaction of alkoxide or phenoxide with a methyl or primary alkyl halide
In amide synthesis mechanism, acetic anhydride and phenetidine (p-ethoxyaniline) react to phenacetin through a nucleophilic acyl substitution
Hence, the given statement is true
Kidney disease affects the immune system by weakening it, definately. Disease really can't help it at all
