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Potassium Chloride (KCl) Potassium Fluoride (PF) Potassium Iodide (KI) Interesting facts: It was the first metal to be isolated using electrolysis. How many neutrons does mercury have? Symbol: K. Atomic Number: 19. How many neutrons does platinum have… How many neutrons does hydrogen have? Potassium-40 has twenty one neutrons. Potassium-39 has twenty neutrons. Basic Information. How many protons and electrons does this ion have? Because potassium has 3 isotopes, then we have to calculate for the different atomic weights of the isotopes: Potassium-39- It has 19 protons and atomic mass is 39. It catches fire when exposed to water. 0. ----protons __-_electrons -----neutrons 2)An ion of oxygen has a charge of -2. how many protons, neutrons, and electrons does the atom have? Booster Classes. How many neutrons does potassium have? 80. How many protons does platinum have? Blurtit. 121. Your dashboard and recommendations. Hence the number of neutrons is the atomic mass minus the atomic number, 39 - … So for potassium, 19 taken away from 39 leaves 20 neutrons. By subtracting the number of protons or electrons from that number (in this case, 19), the total remaining is the number of neutrons. It burns with a violet flame. Switch to. And how did I know? Chemistry Q&A Library Please help questions! Clearly, there are 19. Home. Potassium is element #19, that means K has 19 protons. How many protons does helium have? Since potassium has 19 electrons you know that it then has 19 protons because there is no charge change. Hence, number of neutrons is 40 - … We know that potassium has an atomic number of 19 and an atomic mass of 39.0983 amu. 1)An ion of potassium has a charge of +1. Melting Point: 63.65 °C (336.8 K, 146.57 °F) Boiling Point: 774.0 °C (1047.15 K, 1425.2 °F) Number of Protons/Electrons: 19. Number of Neutrons: 20. Personalized courses, with or without credits. Study Guides. Potassium-40- It has 19 protons and atomic mass is 40. 117. Name: Potassium. Figure 2.1.2: How many neutrons do (K) potassium-39 and potassium-40 have, respectively? People rarely look at the world around them in atomic terms, unless perhaps they are scientists. Other examples of isotopes: C-12, C is #6, it … Mass number = # protons + # neutrons. Get the detailed answer: How many neutrons do (K) potassium 39 and potassium 40 have, respectively? So to get the number of neutrons, you take the average mass of 39 and subtract the number of protons and that leaves you with 20 neutrons. How many protons does mercury have? The element in question is potassium, the 19 symbolising the atomic number, the number of protons. Rounded down, it is 39 for potassium. Hence, number of neutrons is 39 - 19 which is 20. Well, how many protons are in the [math]^{40}K[/math] isotope? Atomic Mass: 39.0983 amu. It is found in all living plant and animal cells. # neutrons = 22. 78. 2. 41 = 19 + # neutrons. 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