Which of the following is a macro nutrient ?
Correct answer: D. carbon
- A. boron
- B. iron
- C. copper
- D. carbon
Explanation
Carbon is a macronutrient because plants require it in large amounts to build carbohydrates, proteins, lipids and other organic compounds. Boron, iron and copper are required only in trace amounts and are therefore micronutrients. The likely mistake is choosing iron because it is essential, but essential does not mean macronutrient.
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About Periodic Properties and Trends
Periodic properties arise from electron configuration and effective nuclear charge, producing trends in atomic and ionic radius, ionization energy, electron affinity, electronegativity, metallic character and reactivity. Comparisons run across periods and down groups, with attention to common exceptions. The topic also relates these trends to the behavior of s-block and p-block elements.
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