Answer the question below based on the periodic table entry for iron.
26
fe
naon
iron
55.845
what is the atomic mass?

when heated, the valance electrons increased their speed and transferred the heat from electron to electron.   i just took the test.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.