객관식
The number of protons in an uncharged atom __________.
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2. Chemistry
Atoms- Smallest Unit of Matter
객관식
Which of the following is a trace element?
A
Hydrogen
B
Oxygen
C
Nitrogen
D
Copper
검증된 단계별 안내1
Understand the concept of trace elements: Trace elements are chemical elements required by living organisms in very small amounts, usually less than 0.01% of their total body weight.
Identify the common elements in biological systems: Hydrogen, oxygen, and nitrogen are major elements that make up a significant portion of living organisms, often referred to as macronutrients.
Recognize the role of copper: Copper is a trace element, meaning it is needed in small quantities for various biological functions, such as enzyme activity and electron transport.
Compare the quantities needed: While hydrogen, oxygen, and nitrogen are needed in large amounts, copper is required in much smaller amounts, highlighting its role as a trace element.
Conclude that copper is the trace element among the options provided, as it fits the definition of being required in minimal quantities for biological processes.
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