When will the universe end ?

I think 20 billion years until the sun dies out

Explanation:

The universe will never end. Its not a thing like stars and planets and stuff, its the medium in which matter goes through. The problem with us humans is that we cant grasp concepts like infinity. Hence why we call pi an irrational number.

Explanation:

the alkaline earth metals (beryllium (be), magnesium (mg), calcium (ca), strontium (sr), barium (ba), and radium (ra)) are a group of chemical elements in the s-block of the periodic table with very similar properties: shiny. silvery-white. hopefully this ? i didn't fully understand the question