When 
Ra decays by emitting an alpha particle, what is the atomic number of the resulting nucleus? What is the resulting atomic mass?
A. atomic number = 86; atomic mass = 222
B. atomic number = 87; atomic mass = 224
C. atomic number = 87; atomic mass = 226
D. atomic number = 86; atomic mass = 224
Answer: A
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a. true b. false
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A) Dust Bowl B) driftless area C) rainshadow D) basin and range
When the net force on an object equals zero, its acceleration
A. is zero. B. and velocity are the same. C. may be zero. D. none of the above
What was the result of the 1967 Six Day War?
A) the cessation of hostilities between Iran and Iraq B) Israel gained the Gaza Strip, the Golan Heights and the West Bank C) the defeat of Israel at the hands of a multilateral Arab invasion force D) Israel and Egypt signed a peace treaty in which they agreed to joint ownership of the Sinai Peninsula E) Israel was forced to surrender its claim over Jerusalem