WebEach shell can contain only a fixed number of electrons: the first shell can hold up to two … WebApr 29, 2024 · To calculate the number of atoms in a sample, divide its weight in grams by the amu atomic mass from the periodic table, then multiply the result by Avogadro's number: 6.02 x 10^23. Express the relationship of the three pieces of information you need to calculate the number of atoms in the sample in the form of an equation.
How many atoms are present in 4.09 \\mathrm{~g} of …
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WebScience. Chemistry. Chemistry questions and answers. How many grams of Scandium are … WebJul 12, 2024 · About 20% is made up of exotic dark matter particles and about 75% is made up of even more exotic dark energy. This dark-matter-based model (for each gram of normal matter there are 25 grams of the exotic dark matter) is about 20 years old, but the strong belief in the scientific community that dark matter exists goes back 30 years. ___ There ... WebSep 3, 2024 · Solution. Use the Periodic Table to find the atomic number of Sc ( scandium ). The atomic number is 21, which means that scandium has 21 protons. While a neutral atom for scandium would have the same number of electrons as protons, the ion is shown to have a +3 charge. This means it has 3 fewer electrons than the neutral atom or 21 - 3 = 18 ... hillary vedvig