Textbook Question
Using the periodic table, predict the charge of the most stable ion of the following elements: e. Se
2. Atoms & Elements
Periodic Table: Charges
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Which element possesses a -2 charge when it combines with other elements?
A
Ca
B
Mn
C
P
D
Se
E
F
Verified step by step guidance1
Identify the periodic table group where elements typically form a -2 charge. Elements in Group 16 (the oxygen group) often form a -2 charge when they gain electrons to achieve a stable electron configuration.
Examine the elements listed in the problem: Ca (Calcium), Mn (Manganese), P (Phosphorus), Se (Selenium), and F (Fluorine). Determine which of these belong to Group 16.
Recognize that Selenium (Se) is in Group 16 of the periodic table. Elements in this group, such as oxygen, sulfur, and selenium, typically gain two electrons to form a -2 charge.
Understand the electron configuration of Selenium. Selenium has six valence electrons and needs two more to complete its octet, which is why it forms a -2 charge.
Conclude that Selenium (Se) is the element that possesses a -2 charge when it combines with other elements, as it belongs to Group 16 and follows the typical behavior of gaining two electrons.
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