Answer:
b. in the middle
Explanation:
your answer choice is correct!
The answer is covalent bonds.
This theory was first proposed by Nicklaus Copernicus. Copernicus was a polish astronomer. He first published the heliocentric system in hes book: De revelation erbium comestible, "In revelations of the heavenly bodies," which appeared in 1543. HOPE IT HELP:)
Answer: C. Some are metals and some are nonmetals.
Explanation:
Finish their experiment and conclusions, then remake their observations and reform a new hypothesis and procedure, and repeat until they are correct
