No. Hydrogen exists as a diatomic gas.
He2 does NOT exist, Helium is a noble gas and a mono-atomic elementary gas (He)
No, (solid) metal elements are not diatomic
diatomic
Yes. Sodium permanganate is an ionic compound comprising mono-atomic sodium cations and polyatomic permanganate anions.
No. Hydrogen exists as a diatomic gas.
Yes it is. Lead is never found as Pb2 the diatomic condition. This is usually found in the halogens; nonmetals.
None. Helium has completely filled orbitals it is stable and chemically inert (non-reactive). So, helium exists as mono atomic and not as a diatomic species.
It's diatomic at room temperature. I have never heard of actual monoatomic chlorine, maybe some physicist created some in a lab at incredibly low or high temperatures, but I would say it is diatomic for all intents and purposes.
No
who discovered the mono-atomic ions?
He2 does NOT exist, Helium is a noble gas and a mono-atomic elementary gas (He)
Sodium is not mono isotopic. It has two isotopes. Namely they are sodium-23 and sodium-24.
Yes. all are mono atomic
Diatomic gases can absorb heat to increase their vibrational and rotational energy in addition to their translational energy. Monatomic gases have no bonds to vibrate or rotate.
Yes. Sodium Glutamate and Mono sodium glutamate (MSG) are interchangeable. (C5H8NNaO4)
No, (solid) metal elements are not diatomic