If a material mixes readily with water it is describe as HYDROPHILIC. Hydrophilic substances are water loving molecules, there reaction with water is favorable in term of thermodynamics. This type of substance are usually charged and often have ability to get involve in hydrogen bonding.
A. Cesium because reactivity of alkali metals increases from the top to the bottom of the group.
Answer:
It is either
Past volcanic eruptions leave marks on rocks near the volcano.
Past volcanic eruptions leave marks in the atmosphere.
My guess is C.
Explanation:
