Multiple Choice
What is the name of a positively charged ion?
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2. Atoms & Elements
Ions
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When potassium forms an ion, which of the following occurs?
A
It gains one electron to form K^-
B
It loses one electron to form K^+
C
It loses two electrons to form K^{2+}
D
It gains two electrons to form K^{2-}
Verified step by step guidance1
Identify the element in question: potassium (K) is an alkali metal located in Group 1 of the periodic table.
Recall that elements in Group 1 typically lose one electron to achieve a stable noble gas electron configuration.
Understand that losing one electron results in a positively charged ion (cation) with a charge of +1, denoted as K^{+}.
Recognize that gaining electrons would create anions (negative ions), which is uncommon for alkali metals like potassium.
Conclude that potassium forms an ion by losing one electron to form K^{+}, not by gaining electrons or losing two electrons.
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