Potassium-40- It has 19 protons and atomic mass is 40. 117. Potassium is element #19, that means K has 19 protons. 78. And how did I know? 41 = 19 + # neutrons. How many protons does mercury have? Atomic Mass: 39.0983 amu. Number of Neutrons: 20. Chemistry Q&A Library Please help questions! Potassium Chloride (KCl) Potassium Fluoride (PF) Potassium Iodide (KI) Interesting facts: It was the first metal to be isolated using electrolysis. 2. Personalized courses, with or without credits. Potassium-40 has twenty one neutrons. How many neutrons does platinum have… How many neutrons does mercury have? 80. # neutrons = 22. Switch to. Clearly, there are 19. How many protons and electrons does this ion have? Get the detailed answer: How many neutrons do (K) potassium 39 and potassium 40 have, respectively? How many neutrons does hydrogen have? People rarely look at the world around them in atomic terms, unless perhaps they are scientists. How many neutrons does potassium have? Other examples of isotopes: C-12, C is #6, it … How many protons does platinum have? Name: Potassium. Homework Help. Home. Potassium-39 has twenty neutrons. ----protons -----neutrons --- … 121. Figure 2.1.2: How many neutrons do (K) potassium-39 and potassium-40 have, respectively? 0. How many protons does helium have? 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. 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. Mass number = # protons + # neutrons. Symbol: K. Atomic Number: 19. Hence, number of neutrons is 40 - … By plugging in these values, we can therefore deduce that:Atomic Number (19) = 19 ProtonsAtomic Number (39.0983) = 19 Protons + Number of NeutronsNumber of Neutrons = 39.0983 - 19 = 20.0983 ≈ 20 In essence, potassium has 20 neutrons. Your dashboard and recommendations. It burns with a violet flame. Study Guides. So for potassium, 19 taken away from 39 leaves 20 neutrons. 1)An ion of potassium has a charge of +1. It catches fire when exposed to water. Basic Information. Booster Classes. Since potassium has 19 electrons you know that it then has 19 protons because there is no charge change. Blurtit. Hence the number of neutrons is the atomic mass minus the atomic number, 39 - … By subtracting the number of protons or electrons from that number (in this case, 19), the total remaining is the number of neutrons. 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. Rounded down, it is 39 for potassium. It is found in all living plant and animal cells. ----protons __-_electrons -----neutrons 2)An ion of oxygen has a charge of -2. how many protons, neutrons, and electrons does the atom have? Well, how many protons are in the [math]^{40}K[/math] isotope? 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