University:
High School
Course:
High School Mathematics
Academic year:

2022
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398

Pages:

2
Author:

efreet4ifh37v

Name: ______________ANSWER KEY___________________ Date: ______________________________ Period: _________ Summative 3.1, 3.2, 3.3 Study Guide – ANSWER KEY Learning Target 3.1 1. Complete the following table. Element Symbol Atomic # Atomic Mass # protons # neutrons # electrons Argon Ar 18 40 18 22 18 Cadmium Cd 48 112 48 64 48 Praseodymium Pr 59 140 59 81 59 Lead Pb 82 207 82 125 82 Tungsten W 74 184 74 110 74 Nuclear Symbol 40 Ar 18 112 Cd 48 140 Pr 59 207 Pb 82 184 W 74 Learning Target 3.2 2. Label the parts of the atom to the right. What is the charge on each subatomic particle? Identify where the mass is located and where the volume is located. Proton = +1 Neutron = 0 Electron = -1 Nucleus = Mass Electron cloud = Volume Electron Proton 3. Draw Bohr models for Lithium, Calcium, Neon, and Phosphorous. How many valence electrons does each one have? Neutron Learning Target 3.3 4. Complete the following table. Element Ion Symbol Atomic # Atomic Mass # protons # neutrons # electrons Co2+ 27 59 27 32 25 Aluminum Al3+ 13 27 13 14 10 Palladium Pb2+ 46 106 46 60 44 Cesium Cs2+ 55 133 55 78 53 Iodine (-1) I- 53 127 53 74 54 Cobalt Nuclear Symbol (include charge) 59 2+ Co 27 27 3+ Al 13 106 2+ Pb 46 133 2+ Cs 55 127 I 53 5. Why does iodine form an ion? Iodine has 7 valence electrons. All elements want to have a full shell/orbit/energy level of electrons to be stable. In this case, iodine wants 8 valence electrons (octet rule). In order to get 8 electrons, iodine will form an ion (unequal amounts of protons and electrons) to get its full shell.