When the temperature goes up, the volume will also go up What is the possible reason?
Mention one real-world example?

Yes it will

An example is ice, when it melts the volume goes up which means it occupies much more space

answer: atomic mass was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.

explanation:

originally atomic mass was used to arrange elements on the periodic table from left to right in a row. each column then shows similar properties of elements of a group.

in modern periodic table, the atoms are arranged in increasing atomic number. as atomic number represents the number of protons in an atom which is unique for every atom.