New Worksheet - Atomic Models and Radioactive Decay (II)

Use a periodic table to help you answer the questions below.

1. What is the atomic number for cobalt?
Answer: ___________________

2. Give the information about what the Bohr model says a arsenic-75 atoms looks like. (Electron capacity for each orbit: orbit 1 is 2 electrons; orbit 2 is 8 electrons; orbit 3 is 18 electrons; orbit 4 is 32 electrons; orbit 5 is 50 electrons).
number of protons ___________________
number of neutrons ___________________
number of electrons in orbit 1 ___________________
number of electrons in orbit 2 ___________________
number of electrons in orbit 3 ___________________
number of electrons in orbit 4 ___________________
number of electrons in orbit 5 ___________________

3. A radioactive isotope with a half-life of 5 hours is used in scientific research. If a scientist starts with 2,000 grams of the isotope, how many grams will be left in 35 hours?
Answer: ___________________

4. Find the daughter products of Cm-247 if undergoes alpha, beta, and gamma radiation.
alpha: ___________________
beta: ___________________
gamma: ___________________

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