Why are Gallium and Cesium and Francium indicated as liquids on some periodic tables but not on others?

Answer 1

They are sometimes indicated as liquids because they all have really low melting points. Gallium would melt from the heat of your hand. Cesium and Francium are very radioactive and don't occur in nature often, but when they are synthesized, they tend to be in small quantities of liquid. The states of matter on the periodic table are typically at room temperature, and for most it is around 25 degrees Celsius. If the "room temperature" is higher than that, (for example, 98.6 degrees fahrenheit--the internal temperature of the human body) some of the metals melt to liquid.

Answer 2

Elements can exist in all states of matter. However, the state in which it occurs at room temperature is taken into account usually. In the Periodic Table, only two elements are known to be in liquid state at room temperature; they are Bromine and Mercury.

Answer 3

Gallium, cesium, and francium are indicated as liquids on some periodic tables because they have relatively low melting points. These elements are solid at room temperature but readily melt into liquids at slightly elevated temperatures. Some periodic tables may highlight this property to emphasize the unique behavior of these elements.