Mass spectrometric analysis of potassium and argon atoms in a Moon rock sample shows that the ratio of the number of (stable) argon (atomic mass=40) atoms present to the number of (radioactive) potassium (atomic mass=40) atoms is 10.3. Assume that all the argon atoms produced by the decay of potassium atoms, with a half-life of 1.25 EXP9 years. Assume that the initial number of potassium atoms were present at the time the rock was formed by solidification from a molten form and for every potassium atom that decays, an argon atom is produced.
Radioactive decay
The emission of energy to produce ionizing radiation is known as radioactive decay. Alpha, beta particles, and gamma rays are examples of ionizing radiation that could be released. Radioactive decay happens in radionuclides, which are imbalanced atoms. This periodic table's elements come in a variety of shapes and sizes. Several of these kinds are stable like nitrogen-14, hydrogen-2, and potassium-40, whereas others are not like uranium-238. In nature, one of the most stable phases of an element is usually the most prevalent. Every element, meanwhile, has an unstable state. Unstable variants are radioactive and release ionizing radiation. Certain elements, including uranium, have no stable forms and are constantly radioactive. Radionuclides are elements that release ionizing radiation.
Artificial Radioactivity
The radioactivity can be simply referred to as particle emission from nuclei due to the nuclear instability. There are different types of radiation such as alpha, beta and gamma radiation. Along with these there are different types of decay as well.
Based on the problem below, how old is the rock? (ANSWER IN SCIENTIFIC NOTATION, UNIT SHOULD BE IN YEARS
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