Which of the following statements best describes the role of neutrons in the nucleus?
A. The neutrons stabilize the nucleus by balancing charge.
B. The neutrons stabilize the nucleus by attracting other nucleons.
C. The neutrons stabilize the nucleus by forming bonds with other neutrons.
D. The neutrons stabilize the nucleus by adding mass.
E. The neutrons stabilize the nucleus by attracting protons.
Answer: B
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In Christaller's model of central place theory, an urban hierarchy is demonstrated by the distribution of larger cities as a grid of larger hexagons superimposed upon the grid of small hexagons representing smaller towns
Indicate whether the statement is true or false.
?Match the term with the correct description.
A. ?bacteria, viruses, protozoa, parasites B. ?oil, gasoline, plastics, pesticides, cleaning solvents C. ?lead, mercury, arsenic D. ?nitrate and phosphate E. ?biodegradable animal wastes and plant debris
After an economic recession in the 1980s, the city of ________ renewed itself as a sustainable city
A) Port Au Prince, Haiti B) Oslo, Norway C) Los Angeles, California D) Malmo, Sweden E) Toronto, Canada
The last step in formation of a typical landscape is
A) erosion. B) deposition of sedimentary layers. C) lithification into sedimentary rocks.