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