Answer:
D. A north pole and south pole attract each other
It is b I think
cause,
pressure defines as the force per unit area.
Hydrogen and Helium cannot bond together. Put aside the inertness of helium (or all noble gases), bond formation is only favored when the final state of the two elements is more stable than their initial state. ... Helium compounds has some predictions though none of them contain only those two elements.
Explanation:
group 8 elements don't react with other elements because they are noble element which means that they can't lose or gain electron.
The compound may or may not be poisonous, depending on the chemical properties of the new substance.
