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Isotopic Symbol Construction, Deconstruction and Atomic Mass Calculations Review

Isotopic Symbol Construction, Deconstruction and Atomic Mass Calculations Review. P. Taking Apart Isotopic Symbols. Step 1: Find the Protons Step 2: Find the neutrons by subtracting your protons from your mass number. Step 3: Find your electrons using P+ e = net charge. -. Proton:

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Isotopic Symbol Construction, Deconstruction and Atomic Mass Calculations Review

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  1. Isotopic Symbol Construction, Deconstruction and Atomic Mass Calculations Review

  2. P Taking Apart Isotopic Symbols Step 1: Find the Protons Step 2: Find the neutrons by subtracting your protons from your mass number. Step 3: Find your electrons using P+ e = net charge - • Proton: • Neutron: • Electron: Si 30 14 +2 Na 23 11 • Proton: • Neutron: • Electron:

  3. P Building Isotypic Symbols Step 1: Find and write your symbol using the number of protons. Step 2: write the number of protons on the left bottom side of your symbol. Step 3: Find your mass number by adding your protons and neutrons together. Step 4: write your mass number above your proton number on the upper left side of your symbol. Step 5: Find your electrons using P+ e = net charge Step 6: Write your net charge on the upper right hand side of your symbol. • Proton: 17 • Neutron: 20 • Electron: 15 • Proton: 15 • Neutron: 13 • Electron: 18

  4. P Atomic Mass Practice. Step 1: Find the weight of your isotopes. Step 2: Find the percent abundance by dividing the number of one of your isotopes by the total number of isotopes. Step 3: If in percent form, change to decimal form by dividing by 100 or moving the decimal to the left twice. Step 4: Multiply your weight by your percent abundance in decimal form. Step 5: Add the answers together to find your atomic mass. • Neon has two major isotopes, Neon-20 and Neon-22. Out of every 250 neon atoms, 225 will be Neon-20, and 25 will be Neon-22. What is the average atomic mass of Neon? 

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