Students were asked over to answer a question at education and to express what is most important for them to succeed. The one that response stood out from the rest was practice. Persons who were successful do not become successful by being born. They work hard and dedication their lives to succeeding. If you wish to obtain your goals, keep this in mind! beneath are one of the answer and question example that you could actually work with to practice and enrich your understanding and also give you insights that may assist you to keep up your study in school.
Which answer choice represents a balanced alpha emission nuclear equation? A. 52 26 Fe –> 52 25 Mn+ 0 ⁺1 e. B. 235 92 U –▻ 239 94 Pu + 4 2 He C. 189 83 Bi –▻ 185 81 Tl + 4 2 He D. 14 6 C –▻ 14 7 N + 0 -1 e
Answer is “C”.
alpha decay is an emission of ₂⁴He nucleus. If an element undergoes an alpha decay, the mass of the daughter nucleus formed is reduced by 4 compared to mass of parent atom while the atomic number of parent atom is reduced by 2.
Here, Bi has atomic number as 83 and mass number as 189. When undergoing an alpha emission, formed daughter atom will has 83 – 2 = 81 as atomic number and 189 – 4 = 185 as mass number. The element which has 81 as its atomic number is Thallium (Tl).
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