Isotopes, Lecture notes of Chemistry

Download Isotopes and more Lecture notes Chemistry in PDF only on Docsity! Isotopes - KEY Are all atoms of an element alike? Why? The following activity will help you learn the important structural characteristics of an atom. How do we classify atoms? How does the combination of subatomic particles affect the mass and charge of an atom? What are isotopes? This is just a sampling of what we will address. Throughout this activity you will want to keep Model 1 and a periodic table handy. Model 1 1. Refer to Model 1. What subatomic particles do the following symbols represent? ELECTRONS PROTONS NEUTRONS 2. Complete the table in Model 1 by counting the protons and neutrons in each atomic diagram. 3. Find the three elements shown in Model 1 on your periodic table. a. What whole number shown in Model 1 for each element is also found in the periodic table for that element? Hydrogen – 1 Carbon – 6 Magnesium – 12 b. The whole number in each box of the periodic table is the atomic number of the element. What does the atomic number of an element represent? NUMBER OF PROTONS c. Relative to the atomic symbol (H, C, or Mg), where is the atomic number located in the isotope symbol? LOWER LEFT CORNER 1 1 1 0 1 2 6 6 6 6 7 8 12 12 12 12 13 14