Question

substitution of halogen by alkynaly group​

Answer 1

Notice that when a group such as CH2Br must be regarded as a substituent, rather than as part of the main chain, we may use terms such as bromomethyl. ... alkyl halides are compounds in which one or more hydrogen atoms in an alkane have been replaced by halogen atoms (fluorine, chlorine, bromine or iodine).

Answer 2

HALOGENS BOND WITH ALKALI METAL BY SHARING OF ONE ELECTRON EACH AS HALOGENS ARE MISSING ONE ELECTRON AND ALKALIS HAVE AN EXTRA ONE ELETRON

EXAMPLE : NaCl

Na-> electronic configuration-2,8,1

Na+ ion-> 2,8

Cl->2,8,7

Cl- ion->2,8,8

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