Question

What is the formula of the highest oxide of the element with atomic number 7? Is the oxide acidic or base

Answer 1

the element has 7 electrons which means it is a non metal and it is likely to form acidicy oxide.

Answer 2

Metals react with oxygen to give basic compounds of oxygen. These compounds are usually ionic in nature. Group 1, 2 and lanthanides form basic compounds of oxygen when they react with dixoygen. During the formation of these compounds a large amount of energy is released. These compounds readily react with water except few exceptions.

Examples: M2O3, MO2, ThO2

Na2O + H2O → 2NaOH

Acidic oxides:

Non-metals react with oxygen to form acidic compounds of oxides which are held together by covalent bonds. These compounds can also be called as acid anhydrides. Acid anhydrides usually have a low melting and boiling point except compounds like B2O3 and SiO2 which have high melting points and form giant molecules.

Examples: NO, CO2

SO3 + H2O → H2SO4

B2O3 + H2O → 2H3BO3