Rating | Solver | Clue |
---|---|---|
SILICON | Abundant element | |
OXYGEN | Abundant element | |
ALUMINIUM | Most abundant metal element in the Earth's crust | |
ZINC | An abundant element of the magnesium-cadmium group, extracted principally from the minerals zinc blende, smithsonite, calamine, and franklinite... | |
HYDROGEN | ... thousand times lighter than water. It is very abundant, being an ingredient of water and of many other substances, especially those of animal o... |