Aru is holding a 4 newton box in his arms he walks for 2000 meters while holding the box how much work is done to the box

The answer to this is 'No work has been done to the box' Just took the quiz and it's correct

the answer is c.the valence of the atoms combine .

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.