Question 3 of 10 Which of the following best describes a single-replacement reaction?
O A. Two elements switch places in two compounds.
B. One element takes the place of another in a compound.
C. Two elements combine to form a compound.
D. A compound breaks apart into separate elements.
In

A

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kuchisake

kuchisake-onna (口裂け女, "slit mouth woman ") is a malevolent figure appearing in japanese ghost stories, possibly dating back to the edo period. she takes the form of a masked woman who approaches people and asks them if they believe she is pretty.

explanation:

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.