It can tell us how old they are and how and where they moved in the past.
scandium is a transition metal and shows a valency of 3.
<span>D.) Oxygen would acquire a stable arrangement of electrons by bonding with two atoms of "Magnesium"
[ As Mg has 2 extra electrons & their size are quite similar ]
Hope this helps!</span>
Answer:
The scientific laws have been well proven before they are published so it is difficult to prove mistakes
Explanation:
