What are the three different states matter can be in? Solid

Liquid

Gas

There are main groups in the modern periodic table of elements

Sodium sulfate dissolves as follows: na2so4(s) → 2na+(aq) + so42- (aq). how many moles of na2so4 are required to make 1.0 l of solution in which the na concentration is 0.10 m?

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)