It is not possible to answer this question without more information on what CG is.
Yes.
Lithium will react violently with water. Do not put it in water
alkali metals react violently in cold water
One example of an element that fits this description is noble gas. Noble gases such as helium, neon, and argon do not react with water and can react violently with air when exposed to certain conditions.
Yes, it reacts with the oxygen in the air and water very violently.
it is a chemical property
Cesium reacts violently with water, oxygen and the halogens
Sodium react violently with water releasing hydrogen !
Yes, cesium is expected to react violently with water. This is because cesium belongs to the same group (alkali metals) in the periodic table as lithium, sodium, and potassium, which are known to react violently with water due to their highly reactive nature and tendency to form alkaline hydroxides and release hydrogen gas.
Oxygen can react violently with flammable materials, such as fuels, causing them to ignite or explode. It can also react violently with certain metals, such as sodium or magnesium, producing intense heat and light.
Argon is chemically inert. It does not react with water.
Sodium ion exist in water as the product of a dissociation; sodium (metal) react violently with water