----protons -----neutrons --- … Hence, number of neutrons is 40 - … Hence, number of neutrons is 39 - 19 which is 20. Potassium Chloride (KCl) Potassium Fluoride (PF) Potassium Iodide (KI) Interesting facts: It was the first metal to be isolated using electrolysis. Clearly, there are 19. Chemistry Q&A Library Please help questions! How many neutrons does hydrogen have? 1)An ion of potassium has a charge of +1. 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 platinum have? Other examples of isotopes: C-12, C is #6, it … 78. We know that potassium has an atomic number of 19 and an atomic mass of 39.0983 amu. ----protons __-_electrons -----neutrons 2)An ion of oxygen has a charge of -2. how many protons, neutrons, and electrons does the atom have? How many neutrons does potassium have? 117. Atomic Mass: 39.0983 amu. 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. Potassium-39 has twenty neutrons. 121. Mass number = # protons + # neutrons. Potassium-40 has twenty one neutrons. So for potassium, 19 taken away from 39 leaves 20 neutrons. Hence the number of neutrons is the atomic mass minus the atomic number, 39 - … People rarely look at the world around them in atomic terms, unless perhaps they are scientists. Figure 2.1.2: How many neutrons do (K) potassium-39 and potassium-40 have, respectively? How many protons does helium have? 2. By subtracting the number of protons or electrons from that number (in this case, 19), the total remaining is the number of neutrons. How many neutrons does mercury have? It catches fire when exposed to water. The element in question is potassium, the 19 symbolising the atomic number, the number of protons. # neutrons = 22. Symbol: K. Atomic Number: 19. 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. Home. 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. Name: Potassium. Homework Help. Basic Information. And how did I know? Personalized courses, with or without credits. Potassium-40- It has 19 protons and atomic mass is 40. Get the detailed answer: How many neutrons do (K) potassium 39 and potassium 40 have, respectively? 3.7 million tough questions answered. Rounded down, it is 39 for potassium. Switch to. 41 = 19 + # neutrons. How many protons and electrons does this ion have? Number of Neutrons: 20. How many protons does mercury have? It burns with a violet flame. Since potassium has 19 electrons you know that it then has 19 protons because there is no charge change. Blurtit. Your dashboard and recommendations. Well, how many protons are in the [math]^{40}K[/math] isotope? Study Guides. It is found in all living plant and animal cells. Booster Classes. 0. Potassium is element #19, that means K has 19 protons. 80. How many neutrons does platinum have…