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ant Sharing tings Tools In plants, potassium is needed for metabolic processes including the regulation of plant growth, Potassium (K) is required by plants for protein synthesis. photosynthesis, enzymes, and ionic balance. Potassium-deficient potato plants may show purple or brown spots and plant, root, and seed growth is reduced. John has noticed that the leaves of his recent crop of potatoes had brown spots, the potatoes were undersized, and the crop yield was low Tests on soil samples indicated that the potassium levels were below 100 ppm, which indicated that supplemental potassium was needed. John applied a fertilizer containing potassium chloride (KCI). To apply the correct amount of potassium, John needs to apply 170 kg of fertilizer por hectare. A mineral deficiency of potassium causes brown spots on potato leaves salasana Panas 1919 tion Part E TA, and has 19 protons and 18 electrons. What is the most prevalent isotope of potassium? (See the table below) Element Lithium Atomic mass (weighted average) 6.941 amu Carbon 12.01 amu Oxygen 16.00 amu 19.00 amu Fluorine Sutur 32.10 amu s.s.s.s K.K.K 39.10 amu Potassium Copper Ca. Ca Express your answer as an isotope. Atomic symbols L. LA C.C.C o o.o "F AEO ? A chemical reaction does not occur for this question. Submit Request An Most prevalent isotope 120 10 "F #s 169 K Cu