Helium i believe is the answer
C. Protons
Protons are subatomic particles found in the nucleus and carry positive electrical charge.
Answer:
p-bromobenzyl cyanide
Explanation:
In a nucleophilic substitution, a nucleophile replaces a leaving group (halide ion) from a carbon atom, using a lone pair of electrons to form a new bond with the carbon atom.
In this reaction, the <u>cyanide ion is the nucleophile</u> and the <u>bromide ion is the leaving group.</u>
This nucleophilic substitution is an example of an SN₂ reaction. This reaction occurs in a single step, where <u>bonds break and form simultaneously.</u>
In this product, the nucleophile occupies the opposite stereochemical position to the original position of the leaving group. This result is known as an inversion of the carbon atom configuration.