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Questions and Answers
Which technique is used to determine the relative abundance of isotopes in a sample?
Which technique is used to determine the relative abundance of isotopes in a sample?
- Titration
- Spectroscopy
- Chromatography
- Mass spectrometry (correct)
If an element has two isotopes with masses 12 and 14, and their relative abundances are 80% and 20%, respectively, what is the element's relative atomic mass?
If an element has two isotopes with masses 12 and 14, and their relative abundances are 80% and 20%, respectively, what is the element's relative atomic mass?
- 12.0
- 13.0 (correct)
- 13.2
- 12.8
Which of the following is a chemical change?
Which of the following is a chemical change?
- Burning of wood (correct)
- Dissolving salt in water
- Boiling water
- Melting of ice
What type of bonding is present in metallic elements?
What type of bonding is present in metallic elements?
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For what purpose is titration typically used?
For what purpose is titration typically used?
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What does the atomic number of an atom represent?
What does the atomic number of an atom represent?
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Who proposed the plum pudding model of the atom?
Who proposed the plum pudding model of the atom?
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What defines an isotope?
What defines an isotope?
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Which ion has a positive charge?
Which ion has a positive charge?
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In terms of atomic size, what trend occurs across a period from left to right in the periodic table?
In terms of atomic size, what trend occurs across a period from left to right in the periodic table?
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What is the electron configuration of oxygen (O)?
What is the electron configuration of oxygen (O)?
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