Question

aluminium is dencer than glass this is because please help​

Answer 1

Answer:

Metallic glasses present lower densities than their cristalline counterparts. I can even be characterized by a parameter called free volume widely developed by Argon and Spaepen, to cite the most famous authors...

With precise enough experiments, you can even measure density increase when your glass relaxes. For example, if you shape your glass in its supercooled liquid zone (Tg<T<Tx), atoms will rearrange under the combined effects of the applied stress and the temperature, and your alloy density will increase.

There is a lot of literature on this subject. If you are interested, let me know, I'll send you papers