Pages 275 - 290
1. What word is the plural of NUCLEUS?
2. If an atom is radioactive, it is said to change ___________.
3. A particle, packet, or bundle of energy is called a ________.
4. What does ionizing radiation do to atoms?
5. Radio waves, microwaves, and visible light waves are NOT ionizing radiation. They are called _______________ radiation.
6. Beam of electrons (like those inside TV picture tubes) are sometimes called ____________ rays (because they are emitted by the negatively-charged terminal, called the cathode).
7. Becquerel discovered that uranium did WHAT to photographic film?
8. What new element fid the Curies discover mixed with uranium ore?
9. What Greek letter is used to signify an alpha ray?
10. Scientists found that when nucleasr radiation was passed through a powerful magnetic field, SOME of the types of radiation was deflected. That was because these types of radiation consist of _______________ particles.
11. How does the mass of an neutron compare to the mass of a proton? (page 283)
12. How does the mass of an ELECTRON compare to the mass of a proton or a neutron?
13. The atom is mostly empty space! If a nucleus was the size of a billiard ball, what would be the radius of the space occupied by the electrons? (page 283)
14. The ATOMIC NUMBER is the number of __________ in a nucleus.
15. ISOTOPES are atoms of an element that... (finish!)
16. The MASS NUMBER is the sum of _________ plus __________ in the nucleus of an atom.
17. A radioisotope is a _________________ isotope of an element.
Comments? Questions??
Robert Clark