How long will it take the sun to go around the galaxy once?
a. 200 million years
c. 100 thousand years
b. 10 years
d. 5 billion years

200 million years.
the exact answer is  226 million years.
the planets in our solar system orbit around the sun. one orbit of the earth takes one year. meanwhile, our entire solar system orbits the center of the milky way galaxy. our sun and solar system move at about 800 thousand kilometers an hour – that’s about 500 thousand miles an hour – in this huge orbit. so in 90 seconds, for example, we all move some 20,000 kilometers – or 12,500 miles – in orbit around the galaxy’s center.

Ametal with a large number of free flowing electrons most likely has good conductivity