Aluminium | MCQs

Explanation

Aluminium has a valency of 3 because it loses three electrons to achieve a stable electron configuration.

Its atomic number is 13.

Its electron configuration is 2, 8, 3.

This means it donates three electrons to form Al³⁺ ions.

Explanation

Aluminium burns in oxygen with a brilliant white flame, producing aluminium oxide (Al₂O₃).

This reaction is highly exothermic.

It is often seen in thermite reactions and metal combustion demonstrations.

Explanation

The atomic mass of aluminum (Al) is 26.98, which is approximately 27.

This is the most common isotope of aluminum, which has an atomic number of 13.

Explanation

Aluminium powed + Nitrate Called Ammonal  

Ammonal is an explosive made up of ammonium nitrate and aluminium powder, in which the ammonium nitrate functions as an oxidizer and the aluminium as fuel.

The mixture is often referred to as Tannerite, which is a brand of ammonal.

The ammonium nitrate functions as an oxidizer and the aluminium as fuel.

The use of the relatively cheap ammonium nitrate and aluminium makes it a replacement for pure TNT.

Explanation

Aluminium is capable of superconductivity, with a superconducting critical temperature of 1.2 kelvin

And a critical magnetic field of about 100 gauss (10 milliteslas)

It is paramagnetic and thus essentially unaffected by static magnetic fields