What volume of silver metal will weigh exactly 2500g. The density of silver is 10,5 g/cubic centimeters.

That result from subduction of oceanic plates beneath lighter continental plates. most of the earth's volcanoes are located around the pacific ring of fire because that the location of most of the earth's subduction zones.

Cause its being chemically applied?

No. an alpha particle is a pair of protons and a pair of neutrons, i.e. a helium

They cool it down and aluminum cools easily