Multiple Choice
When an atom loses an electron, it becomes a:
1
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2. Atoms & Elements
Ions
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In the context of ions and electrochemistry, what does the symbol Ø (an 'O' with a line through it) typically represent?
A
Standard state conditions, such as 1 atm pressure and 1 M concentration
B
The oxidation number of an element
C
The number of valence electrons
D
The charge of an ion
Verified step by step guidance1
Recognize that the symbol Ø (an 'O' with a line through it) is commonly used in electrochemistry and thermodynamics to denote standard state conditions.
Understand that standard state conditions typically refer to a pressure of 1 atm for gases, a concentration of 1 M for solutes, and pure solids or liquids as the reference state for thermodynamic measurements.
Recall that this symbol is often seen in notation such as $\Delta G^{\circ}$ or $E^{\circ}$, where the superscript \( \circ \) (which looks like a small circle) indicates standard state values, but the symbol Ø is sometimes used interchangeably or in related contexts to represent standard conditions.
Differentiate this from other options: oxidation number refers to the charge assigned to an atom in a compound, valence electrons are the electrons in the outer shell of an atom, and the charge of an ion is the net electric charge, none of which are represented by the symbol Ø.
Conclude that the symbol Ø typically represents standard state conditions such as 1 atm pressure and 1 M concentration in the context of ions and electrochemistry.
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