![]() ![]() SIDE NOTE Actually, chromium-51 decays via electron capture to vanadium-51, so I assume that this was just a practice problem for understanding how to balance nuclear equations and how various types of radioactive decay work. The radioactive decay that in which an electron and an electron antineutrino are emitted from the nucleus of a radioactive isotope is called beta-minus decay, #beta^-# decay. So, the nuclear equation will look like this ![]() In addition to this, in order for the charge to be preserved as well, an electron antineutrino, #bar(nu)_e#. Neutron Number and Mass Number of Chromium Mass numbers of typical isotopes of Chromium are 50 52-54. Well, if a neutron is converted into a proton, the mass number will remain unchanged, but the atomic number will increase by #1#. by Nick Connor Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. This means that a neutron from chromium-51's nucleus was converted into a proton and an electron. Notice that the product of the decay has one extra proton than chromium-51, but that their mass numbers are equal. So, what must happen in order for this reaction to take place? The chromium atom has about twenty-six isotopes. #""_24^51"Cr" -> ""_25^51"Mn" + color(blue)(?)# The number of protons in an isotope atom does not change but the number of neutrons does. The nuclear equation for this decay will look like this However, since you're essentially dealing with the isotopes of the different elements, chromium and manganese, then you know for a fact that their atomic numbers will be different.Ī quick look in the periodic table will show you that chromium's atomic number is equal to #24# and manganese's atomic number is equal to #25#. For the above chart, find the number of protons for the element. explanation for isotopes worksheet - Explanation for. In your case, you know that you're dealing with two isotopes that have the same mass number, #51#. Chromium-58 Chromium-63 of protons Upload to Study. So, you know that chromium-51 decays into manganese-51, but you don't know what type of radiation is emitted when this takes place.įor an isotope, the number that follows the element's name represents its mass number, which tells you how many protons and neutrons the isotope has in its nucleus.
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