2. Atoms & Elements

Isotopes

Multiple Choice
Which subatomic particle determines the identity of an element?
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Multiple Choice
Which of the following statements best describes isotopes?
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Multiple Choice
Which statement best describes isotopes and how they are similar and different from each other?
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Multiple Choice
Which of the following statements is correct about the isotope of plutonium with 94 protons and a mass number of 241?
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Multiple Choice
How many neutrons are present in the nucleus of an isotope of phosphorus with a mass number of 32?
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Multiple Choice
Gallium has an atomic mass of 69.723 amu. The Ga-69 isotope (68.926 amu) is 60.11% abundant. What is the mass (amu) of the other isotope?
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Multiple Choice
Which statement correctly describes the number of neutrons in a normal hydrogen atom (protium)?
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Multiple Choice
In what way do isotopes of an element differ from each other?
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Open Question
What is the mass number of the isotope with the symbol ³⁷Cl₁₇?
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Multiple Choice
How many neutrons are present in an atom of magnesium-25 (Mg-25)?
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Multiple Choice
How many neutrons does a sodium (Na) atom typically have?
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Multiple Choice
Which of the following best describes how an isotope differs from the standard form of a chemical element?
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Multiple Choice
Which element has an isotope with 16 neutrons and a mass number of 30?
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Multiple Choice
How many neutrons are in the nucleus of a potassium atom with a mass number of 39?
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Open Question
The superscript preceding each hydrogen atomic symbol (H) represents which of the following?
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