These are elements that are present only in ... they found that doesn't mean it's the only metal the enzyme can use. "Zinc and iron is a really dramatic example because zinc is absolutely ...

Steel is a mixture of elements but it is mostly iron, and it is also magnetic. The other metal elements are not magnetic. Metals react with oxygen to produce compounds called metal oxides.

Sometimes these elements are unwanted ... Cast iron contains high levels of carbon, which makes it a hard, brittle metal. Cast iron was commonly used throughout Europe to make church bells ...

They consist mainly of iron-nickel metal with small amounts of sulphide and carbide minerals. During the decay of radioactive elements in the early history of the solar system, many asteroids melted ...

Say 'oxygen' or 'iodine' and there is no clue in the sound of the word to the nature of the element. But zinc is different. Zinc - zinc - zinc - you can almost hear a set of coins falling into an old ...

Although considered a micronutrient for plants, iron is an essential trace element required for the ... areas of the open ocean have surface trace metal concentrations in the nanomolar to ...