Mg- is the isoelectronic of Na
Good luck on this one brp
Ca because it has a larger atomic radius.
Elements that exceed the octet rule must have an unoccupied d orbital. I believe.
A canyon is a deep ravine between pairs of escarpments or cliffs and is the most often carved landscape by the erosive activity of a river over geologic timescales. A canyon may also refer to a rift between two mountain peaks, such as those in ranges including the Rocky Mountains, the Alps, the Himalayas or the Andes.
