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Chapter 14: Science 8 Vocabulary Quiz: Word List a. alpha particle b. anode c. atomic number d. beta particle e. cathode f. electron g. actinides h. electron cloud i. element j. half-life k. isotope l. mass number m. neutron n. proton o. radioactive decay p. transition q. transmutation 1. 2. 3. 4. 5. 6. 7. 8. When a neutron is converted into a proton, this is an example of _________. This is the process by which one element changes into another element. Atoms of the same element with a different number of neutrons are called _. The atomic number of an element is equal to _____________. This is the smallest of the three atomic particles. The positive electrode in a CRT is called the _________________. The positively charged particle in an atom is called ___. The area surrounding the nucleus of an atom where electrons travel is called the ______. 9. The release of nuclear particles and energy is called ______________. 10. The amount of time that it takes one half of a radioactive atom to decay. 11. The negative electron in the CRT tube is called _____. 12. When an element changes from one element to another it ejects a (n) _____. 13. Matter made of one kind of element is known as an _____________. 14. The actual changing of one element into another is called _____. 15. A high-energy electron that comes from the nucleus and not from the electron cloud is called _______. 16. The number of protons plus the number of neutrons is called _____________. 17. The number of protons of an element can be found by looking at the ________.