Question

1. For Alpha particle, Beta particle and gamma ray, identify number of protons present, neutrons present, and electrons present?

2. Define each type of radiation below

a) Natural radioactivity:

b) Induced radioactivity:

3.A stable nucleus may be converted to an an unstable nucleus by............................. with high energy particles or radiation. New elements have been made by bombarding nuclei of heavy elements with nuclei of light elements. Elements with atomic number greater than 92, are made this way. What is the term for these elements?

4. a) What is background radiation?

b) Describe what is meant by Nuclear Change?

c) What information can be obtained from a standard isotope symbol? Name at least 4.

d) Is it true that one can avoid alpha radiation by wearing gloves and regular clothing? Explain your answer.

e) Is it true that one must use a lead shield to avoid beta radiation? Explain your reasoning.

5. Copper has two major isotopes: 69.1% of copper-63 and 30.9% of copper-65. what is the average atomic mass of copper?(Hint: first calculate the atomic mass in amu using the atomic particle like proton, neutron and electron and use the percent)?

Answer 1