Atomic number and mass worksheet
[PDF File]Webquest: Atomic Theories and Models
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What makes up the atomic number? The Protons in the Nucleus. 16. What makes up the atomic mass? The Neutron and Protons in the Nucleus. 17. What observation led Chadwick (and Rutherford) to conclude there must be something besides just the proton in the nucleus of atoms? Using an experimental method for tracking particle radiationHis experiments were successful. He was able to …
[PDF File]Speed and velocity problems worksheet answer key
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[PDF File]“Build An Atom” Simulation – Build an Ion
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the atomic mass from the periodic table to the nearest whole number to get part of your answer.) From the periodic table, beryllium has an atomic number of 4 and a mass of almost 9 amu. Therefore, a neutral beryllium atom has 4 protons, 4 electrons, and 5 neutrons (# neutrons = mass # - …
[PDF File]The Chemistry of Life
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An electron is a negatively charged particle that has only about 1/1840 the mass of a proton. Electrons constantly move around the space surrounding the atom’s nucleus. Because an atom has the same number of protons and electrons, if it is electrically neutral. Elements and Isotopes A chemical element is a pure substance that consists entirely of one type of atom. Atoms of the same element ...
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