Three elements needed for the healthy growth of plants are_________________?
Correct answer: A. N P K
- A. N P K
- B. N K C
- C. N S P
- D. N Ca P
Explanation
Nitrogen, phosphorus and potassium are the three primary macronutrients required by plants and are represented by the fertiliser notation NPK. They support leaf and protein formation, energy transfer and growth regulation. The likely mistake is choosing N, S and P because sulfur and phosphorus are also essential, but potassium is one of the three primary nutrients.
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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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