in nature, metal a i
element b will be nearer to the top of the activity series of metals, if in nature, metal a is found in a free state while metal b is found in the form of its compounds.
a
c
c
a
c, i think a, b & c a, b and c sapphire and opal. Unfortunately, I do. a - ii, b - iv, c - i, d - iii the first one. shoulders, head and arms A thunderstorm with lots of lighting, wind, and thunder. please