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Middle school biology; Middle school Earth and space science; Middle school physics; High school biology. NEW. High school chemistry. NEW. High school physics. NEW. ... Lesson 5: Atomic structure and electron configuration. The periodic table, electron shells, and orbitals. Shells, subshells, and orbitals.
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The element carbon and why it's essential to life as we know it. Properties and bonding patterns of carbon atoms.
Carbon-14 forms in the atmosphere through cosmic rays interacting with nitrogen-14, creating a small fraction of carbon-14 in living organisms. When an organism dies, its carbon-14 decays back into nitrogen-14 at a known rate, called a half-life (5,730 years). By measuring the remaining carbon-14 in fossils, scientists can estimate their age, helping us understand the history of life on Earth.
I think this sentence would be more appropriate (according to above,Isotopes are different types of a particular chemical element that, due to their position in the periodic table, can contain the same number of protons but a different number of neutrons.
Course: AP®︎/College Chemistry > Unit 1. Lesson 6: Periodic trends. Periodic trends and Coulomb's law. Atomic and ionic radii. Ionization energy: group trend. Ionization energy: period trend. First and second ionization energy. Worked example: Identifying an element from successive ionization energies. Electron affinity: period trend.
परमाणु संख्या (Atomic number) और द्रव्यमान संख्या (mass number)
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