4.4 CHAPTER 4. ATOMICNUCLEI
Activity: Radiation
In groups of 3-4, discussthe following questions:- Which of the three types of radiation is most dangerous to living creatures (including
humans!) - What can happen to people if they are exposedto high levels of radiation?
- What can be done toprotect yourself from radiation (Hint: Think ofwhat a radiologist
(person who takes X-rays) does when you go foran X-ray)?
Exercise 4 - 1
- There are two main forces inside an atomic nucleus:
(a) Name these two forces.
(b) Explain why atoms that contain a greater number of nucleons are more likely to be radioac-
tive.- The isotope^24195 Am undergoes radioactive decay and loses threealpha particles.
(a) Write the chemical formula of the element that is produced as a result of the decay.
(b) How many nucleons does this element contain?- Complete the following equation:
210
82 Pb→ (alpha decay) - Radium-228 decays by emitting a beta particle. Write an equation forthis decay process.
- Describe how gamma decay differs from alpha and beta decay.
More practice video solutions or help at http://www.everythingscience.co.za(1.) 00x8 (2.) 00x9 (3.) 00xa (4.) 00xb (5.) 00xc4.4 Sources of radiation
ESBAJ
The sources of radiationcan be either natural or man-made.Natural background radiation ESBAK
- Cosmic radiation