There is a boy i like. i don't think he like me what do i do

Well does he act different to you then to people he talk's to? or get's jealous when you maybe talk to someone or always want's to talk with you? sometime's its so easy to tell if someone like's you by they're reaction or the way they talk to you maybe? if you like him and you think he like's him maybe try to have a convo to him saying you like him :)

Explanation:

Tell him what is the worst thet could happen??

Explanation:

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.