Which type of radiation-alpha, beta, or gamma-results in the least change in atomic number?
A. gamma radiation
B. alpha radiation
C. beta radiation
D. They all result in the same change in atomic mass number.
Answer: A
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Just after an alpha particle leaves the nucleus, would you expect it to speed up? Why?
A) No. Once the alpha particle leaves the nucleus it is slowed by the repulsion of the next closest atom's nucleus. B) No. As the alpha particle leaves the nucleus it is slowed by the constant attraction of the electrons surrounding the nucleus. C) Yes. Once the alpha particle leaves the nucleus there are no more forces acting on it and it therefore accelerates. D) Yes. Once the alpha particle leaves the nucleus it accelerates because of mutual electric repulsion with the nucleus from which it escaped.
A globe is a better model of the Earth than a flat map
Indicate whether the statement is true or false.
Brown algae are known as the ________
a. slime molds b. chlorophyta c. phaeophyta d. rhodophyta
After movement, the interior parts of ice slabs and continental plates
A) may be stretched. B) may be rippled up to form hills, ridges, and mountains. C) may be cracked to form crevices. D) remain unchanged.