Could you take 2 elements from the periodic table of elements, and possibly make one of other 116 elements that are on the table? and by the way, just to check, how many elements are there on the periodic table of elements?

That's what stars do all the time. 
For example, in the sun (and MOST other stars), deep down in the center
of the sun's core, two atoms of Hydrogen get squashed together so hard
that they blend into one atom of Helium AND release some energy. 
That's where the sun's energy all comes from.  It's called "nuclear fusion". 
It needs tremendous temperature and pressure to happen.  We know how
to do it, but we can't control it.  So far, the only thing we've ever been able
to use it for is Hydrogen bombs.   

There are 92 elements on the Periodic Table that are found in nature,
plus another 20 or so that have been made in the laboratory, but only
a few atoms of them.

The rocks expand when there hot/warm  and contract when they are cold.

Inelastic is the answer your looking for.