Finland and sweden
No. Scandinavians are of Germanic descent.
Missionaries from the Christian part of Europe traveled to those countries to convert the pagans.
No. Scandinavians are Germanic. Celts are not.
The term "Scandinavians" refers to ethnic groups such as Norwegians, Swedes and Icelanders. You can learn more about Scandinavians from the Wikipedia.
Germans are not Scandinavians. They are different people. So there is no particular reason why they should look alike. Even the various Scandinavians are not alike.
No.
Vikings.
Yes of course.
No. Vikings were Scandinavians.
Russians became a separate nation after the Scandinavians took over the Slav states, which means Slavs and Scandinavians = Russians.
The Vikings.