What is the reaction called when oxygen is taken away from a chemical?
Which chemical element has the symbol Ni?
Coal is composed primarily of which chemical element?
Hg is the symbol for which chemical element?
For which chemical element is N the symbol?
Which chemical element has the symbol Ne?
What is the chemical symbol for the element silver?
What stretch of water separates Greenland and Iceland?
What cocktail is made with gin and vermouth, and garnished with a lemon twist or an olive?
Approximately how much of the Earth's surface is covered by water?
50% | 70% | 90% | 30%
