At room temperature protactinium is a solid metal.
physical and chemical properties. Some metals are found in pure elemental form, while others are typically found in ores that require processing to extract the metal. The abundance and distribution of metals in the Earth's crust also vary.
Most physical changes are reversible because they involve only changes in the physical state or appearance of a substance, rather than its chemical composition. Reversible changes usually involve processes like melting, freezing, dissolving, or changes in shape, which can be easily reversed by applying the appropriate conditions to change the substance back to its original state.
a naturally occurring solid mixture of minerals or organic matter is called
Reactants can exist in the same physical state in a homogeneous system. This means that all the reactants are in the same phase, such as all being in the gas phase or all being in the liquid phase. This is common in reactions that occur in solutions or gases.
Chemical reactions happen on a molecular level Physical reactions are concerned with a change in state or energy level, so melting is considered a physical reaction since there is no molecular change just a change in state.
in there native state
Protactinium is a solid state of matter. Specifically, it is a dense, silvery-gray metal that is radioactive.
Halogens naturally occur in the gaseous state. Examples of halogens are fluorine, chlorine, bromine, iodine, and astatine.
Solid
in solids i think
It is found as a mineral crystal.
Metals typically occur in their native form, meaning they are found naturally as pure elements in the Earth's crust. This is because metals are stable in their metallic form due to their high reactivity with other elements.
Chrysocolla is a powerful healing stone that occurs naturally and forms in certain country such as Zimbabwe, Russia, Spain, Britain, Peru, Israel and the United state of America.
Gold is one of the few metals that occurs in its pure state in nature. Gold pieces found are called nuggets.
Aluminum is a solid at standard temperature and pressure, STP. The ore for sluminum is called bauxite.
Gold can be found naturally as veins running throughout granite and quartz, or with the element tellurium.
Neon at 20 degrees Celsius would be in a gaseous state. Neon naturally exists as a gas at room temperature and pressure.