Isotopes are very similar in their physical and chemical properties, so they would act the same. They differ by only 5 neutrons, and Kr is not very reactive anyway.
No difference; also are known only a very small number of krypton compounds because krypton is not a reactive element.
The electrons, or the electron cloud, of an atom affect how it reacts chemically with other atoms and molecules.
When atoms react, electrons are shared or transferred.
Yes. Hydrogen reacts very easily with many other elements.
Some atoms do not chemically react in nature because they are already stable.
Noble gases have completely filled electronic configuration and hence they are chemically inert (they generally do not form bonds).
Atoms of non-metals usually gain or share electrons when they react with other atoms.
Yes, it is possible.
All of them tend not to react with each other until you get lower down the group
This depends on the ability to gain/loss electrons.
No. helium does not react with any other element
React chemically.
when bases and acids react with each other chemically they form a neutralization reaction