Complete the table below. For example, in the first row decide whether [tex]$Sc ^{3+}$[/tex] is a cation or anion. In the second row, write the symbol for the ion that an atom of potassium is mostly likely to form and then decide what type of ion it is.

| element | most likely ion |
|---|---|
| | symbol of ion | type of ion |
| scandium | [tex]$Sc ^{3+}$[/tex] | |
| potassium | | cation |
| oxygen | | cation |
| barium | | cation |
| chlorine | | cation anion

Scandium forms the ion S c 3 + , which is a cation. Potassium forms K + (cation), oxygen forms O 2 − (anion), barium forms B a 2 + (cation), and chlorine forms C l − (anion). The completed table provides the symbols and types of these ions.
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Answered by Anonymous | 2025-07-05

Scandium ( S c 3 + ) is a cation.
Potassium (K) forms K + , which is a cation.
Oxygen (O) forms O 2 − , which is an anion.
Barium (Ba) forms B a 2 + , which is a cation.
Chlorine (Cl) forms C l − , which is an anion.

Explanation

Problem Analysis We need to complete the table by identifying the ion symbols and types (cation or anion) for potassium, oxygen, barium, and chlorine, and also determine the ion type for scandium.

Scandium Ion Type Scandium ( S c 3 + ) has a positive charge, meaning it has lost electrons. Therefore, it is a cation.

Potassium Ion Potassium (K) is in Group 1, so it loses one electron to form a +1 ion. The symbol is K + . Since it has a positive charge, it's a cation.

Oxygen Ion Oxygen (O) is in Group 16, so it gains two electrons to form a -2 ion. The symbol is O 2 − . Since it has a negative charge, it's an anion.

Barium Ion Barium (Ba) is in Group 2, so it loses two electrons to form a +2 ion. The symbol is B a 2 + . Since it has a positive charge, it's a cation.

Chlorine Ion Chlorine (Cl) is in Group 17, so it gains one electron to form a -1 ion. The symbol is C l − . Since it has a negative charge, it's an anion.

Completed Table Here's the completed table:





element
symbol of ion
type of ion



scandium
S c 3 +
cation


potassium
K +
cation


oxygen
O 2 −
anion


barium
B a 2 +
cation


chlorine
C l −
anion


Examples
Understanding how elements form ions is crucial in many real-world applications. For example, in batteries, the flow of ions between electrodes generates electricity. In the human body, ions like sodium ( N a + ) and potassium ( K + ) are essential for nerve impulse transmission and maintaining fluid balance. Similarly, calcium ions ( C a 2 + ) are vital for bone health and muscle function. Knowing the charge and behavior of these ions helps us understand and develop technologies and treatments that rely on their properties.

Answered by GinnyAnswer | 2025-07-05