GOB Chemistry
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The typical amounts of essential elements in an adult weighing 60 kg are 2 - 39 kg for major elements, 36 - 1000 g for macrominerals, and 2 - 3600 mg for microminerals. Which of the following is the identity of the essential element that is around 120 g in a 60 kg adult?
Phosphorus is a macromineral needed in the formation of teeth and bones. Which of the following elements is expected to have a similar role in the human body?
Most transition elements in period 4, Si, Mo, I, As, and Se are microminerals needed in the body in trace amounts. Which of the following is not a micromineral?
Macrominerals are essential elements from periods 3 and 4 that must be supplied in the daily diet in small amounts. Which of the following is not a macromineral?
Identify the elements in Group 1A (1) as metals, nonmetals, or metalloids.
Identify the elements in Group 7A (17) as metals, nonmetals, or metalloids.
Identify the set that contains a metal, a nonmetal, and a metalloid in this order.
All of the following are properties of metal except for
Among the following groups of elements, which are all metalloids?
Consider the following elements: K, F, C, Ni, Cs, S, Br, Ag, N. How many of these are nonmetals?