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Chapter 4: Q. 4.102 (page 132)
Complete the following table:
| Name | Atomic Symbol | Number of Protons | Number of Neutrons | Number of Electrons |
| Potassium | 19 | 22 | 19 | |
| Vanadium | 23 | 28 | 23 | |
Cadmium | 48 | 64 | 48 | |
| Barium | 56 | 82 | 56 |
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The most abundant isotope of silver is .
a. How many protons, neutrons, and electrons are in ?
b. What is the atomic symbol of another isotope of silver with neutrons?
c. What is the atomic symbol and name of an atom with the same mass number as in part b andneutrons.
What is the group number and number of valence electrons for each of the following elements?
a. Magnesium
b. Iodine
c. Oxygen
d. Phosphorus
e. Tin
f. Boron
Use Rutherford's gold-foil experiment to answer each of the following: ()
a. What did Rutherford expect to happen when he aimed particles at the gold foil?
b. How did the results differ from what he expected?
c. How did he use the results to propose a model of the atom?
What did Rutherford determine about the structure of the atom from his gold-foil experiment?
Argon has three naturally occurring isotopes, with mass numbers and .
a. Write the atomic symbol for each of these atoms.
b. How are these isotopes alike?
c. How are they different?
d. Why is the atomic mass of argon listed on the periodic table, not a whole number?
e. Which isotope is the most abundant in a sample of argon?
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