wing reaction the by causing a large a chemical process where hemical species ch

Question

wing reaction the by causing a large a chemical process where hemical species chemical species to make a radioactive decay ed to electrical mma rays? b. Protons d. Helium nuclei Elecuu magnetic radiation 34 Potassium-40 is a radioisotope that can be used radiometric dating. 40K decays to 40Ca with a half- life of 1.250 billion years. What particle is released during this radioactive decay? 40K 40Ca a. Alpha particle, He b, Beta particle "e' c. Gamma ray, Y d. Positron 'e' e. Proton, H 35. A team led by pre-history archeologist Joao zahio discovered an early upper paleolithic human burial containing the remains of a 4-year old child in Portugal, at Abrigo do Lagar Velio. The age of the memains was determined by radiocarbon dating

Explanation / Answer

mass number of not changing

So, mass of ? is 0

atomic number of K is 19 and that of Ca is 20

So,

atomic number of ? is -1

atomic number if -1 and mass number is 0 for beta particle

Answer: b

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