The elements iron (Fe) and sulfur (S) bond when the elements donate and receive electrons between each other. This type of bond is considered a(n) _______.
A) ionic bond
B) hydrogen bond
C) covalent bond
D) methane bond
A) ionic bond
Ionic bonds form in compounds where the strength of the attraction is sufficiently unequal so that an electron may be transferred from one atom to another, creating oppositely charged ions.
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What is biogeography? It is a branch of
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The first agricultural revolution was characterized by all of the following except
A) domestication of animals such as sheep and cattle. B) new methods to process, prepare and store foods. C) sedentary agriculture based on burning plant matter as a way of returning nutrients to the soil. D) uprising of rural populations against urban landholders. E) centers in Fertile Crescent, South Asia, East Asia, Mesoamerica and the Andes.
Today, what percentage of Aboriginals live in urban areas?
A) 25% B) 90% C) 10% D) 70% E) 35%
Which of these factors are effective in moving heat from one location to another?
A) rain B) clouds C) ocean currents D) all of these