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Carbon-12 - Wikipedia
Web13 jul. 2024 · 1.2: Isotopes. Although all atoms of an element have the same number of protons, the atoms may differ in the number of neutrons they have (Table 1-2). These differing atoms of the same element are called isotopes. Four isotopes of helium (He) are shown in Figure 1-1. All atoms of chlorine (Cl) have 17 protons, but there are chlorine … Web19 sep. 2024 · What element has 8 protons 9 neutrons and 8 electrons? For example, the oxygen atom has 8 protons, 8 electrons, and 8 neutrons, so its atomic mass is 16, that is, the sum of 8 protons and 8 neutrons. Even more we can speak of molecular mass when referring to the sum of the weights of the atoms that form a molecule. pair otium headphones with macbook
How many atoms are in the observable universe? Live Science
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