The reactivity series is a list that shows the order of reactivity of some common metals. Calcium (Ca) Reacts vigorously with strong heating. Brick red flame observed and white solid formed. 2Ca + O 2 ...

As a Bunsen burner heats the bottom of this glass tube, a thin layer of potassium—called a potassium mirror—grows along the tube’s inner wall. Chemists like Andryj Borys, who is a researcher at the ...

Solid, liquid, gas … and something else? While most of us learn about just three states of matter in elementary school, physicists have discovered several exotic varieties that can exist under extreme ...