Neptunium react with hydrogen forming hydrides with formulas between NpH2 and NpH3.
Because neptunium is radioactive, ingestion or inhalation can cause cancers.
BOOM.
Yes, neptunium can be mixed with other elements to form compounds and alloys. Neptunium is a radioactive element, and its compounds are primarily produced for research purposes. Various elements such as oxygen, fluorine, and hydrogen can combine with neptunium to form different compounds.
chalky white precipitate
it makes hydrogen
Helium is completely inert, it is the most inert of all elements, and so it will not react in any way with hydrogen (or with any other element). So, if you mix hydrogen and helium, nothing happens. You have a mixture of hydrogen and helium. It's a lot lighter than air, you can make balloons that will float. Of course, you can do that with pure hydrogen or with pure helium, as well.
The hydrogen and the carbon dioxide mix. Candle uses oxygen and wax as fuel
When hydrogen and xenon are mixed, they will not react with each other as they are both inert gases. The gases will remain as separate entities in the mixture.
Any reaction occur.
Hydrogen is released and sodium chloride&sodium hydroxide remain in solution.
A salt forms. And also hydrogen gas. It is a very explosive, uncontrolable reaction!
When hydrogen and platinum are mixed, the hydrogen molecules can be dissociated on the platinum surface, leading to a reaction where hydrogen atoms adsorb onto the platinum surface. This process is known as chemisorption, and it can be a step in various catalytic reactions that involve hydrogen.