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Questions and Answers
Atoms are made up of protons, electrons, and photons.
False
An atom is the smallest particle of an element.
True
Oxygen gas (O2) is an example of a substance with monatomic molecules.
False
All atoms of a given element are identical in mass and chemical properties.
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The mass number of an atom is equal to the number of protons only.
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Isotopes have the same atomic number but different mass numbers.
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In a compound, the name of the metal or positive part is written after the name of the nonmetal or negative charge.
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Normality is defined as the number of moles of solute in 1 liter of solution.
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Weight percent is commonly used to express the concentration of aqueous reagents.
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Volume percent is typically used to specify the concentration of a solution prepared by diluting a solid compound with another liquid.
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1 ppm is equivalent to 1.00 g/L for dilute aqueous solutions.
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In a compound, formulas for polyatomic ions are written without any superscripts.
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Molarity is calculated as the number of moles of solute in 1 liter of solution.
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Normality for salt is calculated based on the total number of positive or negative charges in the compound.
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Parts per Million (ppm) is commonly used to express concentrations for highly concentrated solutions.
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Dilution involves adding more solute to increase the concentration of a solution.
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