Chernobyl, Ukraine, has become famous because of this event in 1986
A) nuclear reactor accident
B) demonstration against Soviet rule
C) assassination of the Soviet leader
D) nuclear weapons treaty signed by the Soviet Union and China
E) launching of a manned mission to the Moon
Answer: A
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Atoms of metallic elements can form ionic bonds, but they are not very good at forming covalent bonds. Why?
A. These atoms are too large to be able to come in close contact with other atoms. B. They are on the wrong side of the periodic table. C. Their valence shells are already filled with electrons. D. They have a great tendency to lose electrons.
The isotope lithium-7 has a mass of 7.0160 atomic mass units, and the isotope lithium-6 has a mass of 6.0151 atomic mass units. Given the information that 92.58 percent of all lithium atoms found in nature are lithium-7 and 7
42 percent are lithium-6, calculate the atomic mass of lithium, Li (atomic number 3). A) 7.0160 amu B) 6.942 amu C) 6.495 amu D) 13.031 amu
The raw material for coal is dead marine organisms
Indicate whether this statement is true or false.
Which European country set the goal of being the first world power to rely solely on renewable energy by 2050?
a. France b. Germany c. Switzerland d. Spain e. United Kingdom