Chromium is a solid at room temperature.Which one of the following explains why chromium is a solid at room temperature?It has a high boiling & melting point.It is ductile.It has a high density.It is malleable.

The reason why chromium is a solid at room temperature is because it has a high boiling and melting point. The state of matter (solid, liquid, gas) of a substance is determined by its temperature and the arrangement of its particles. In the case of chromium, its high melting point means that at room temperature, the thermal energy is not enough to overcome the forces holding the chromium atoms together in a solid structure. Therefore, it remains a solid until it reaches its melting point.

The properties of being ductile, having high density, and being malleable do not directly determine the state of matter of a substance at a given temperature. These are physical properties that describe how the substance behaves under certain conditions or how it can be manipulated, but they do not explain why chromium is a solid at room temperature.