Sodium is a dull-coloured metal. it is very reactive and must be stored in oil for safety.
chlorine is a pale green, toxic gas. small amounts are used to disinfect swimming pools.
a reaction between sodium and chlorine produces a white, crystalline solid, which is commonly known as table salt.

q: explain why it is difficult to get chlorine out of sodium chloride.

Hi there!

It is difficult to remove chlorine out of sodium chloride because in order to separate them you must put that energy into the salt.

Chlorine gas is toxic, and extremely irritating to the eyes and mucous membranes.

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be