What is the most dense alloy?

Well, my chemistry teacher gave a website link to a website that was supposed to help answer this but it only showed diagrams...

This answer is very necessary for me..please reply soon..some options for this answer are magnalium,manganese steel,type meta...

I kn that ammonia gas is less dense than air, but is there any rule to kn whether a kind of gas is less dense than air, says,...

like thatsounds soo strange but like if the atmospher got thicker too more dense, would we implode on ourselves?

I've heard that matter makes space curve, what does that mean?

Can gold be reduced to an almost worthless material, if so, what and how?

If heat rises why is there always snow on the top of mountins and it gets colder the higher you go?

Say you have a container full of water, and a chunk of ice in there as well...when the ice melts, the water level/volume will...

how did the big bang progress where we are now?

This question seems obvious but the real meaning I am trying to exploit is difficult (for me). I was asked this question in a...