Answer:
Chromium
Explanation:
Cr has 24 atomic number and mass number 52
Most elements on group 18 are the Noble Gases. They already have a complete last level with 8 electrones. Actually they can form compounds but only on the lab and they will not even last half a second.
Answer:
anawer is none of the above
The idea is that all continents move at a rate of approximately 2 inches per year because their moving ever since pangea (all continents were one) separated
