Podcast
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?
For what purpose is titration typically used?
For what purpose is titration typically used?
What does the atomic number of an atom represent?
What does the atomic number of an atom represent?
Who proposed the plum pudding model of the atom?
Who proposed the plum pudding model of the atom?
What defines an isotope?
What defines an isotope?
Which ion has a positive charge?
Which ion has a positive charge?
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?
What is the electron configuration of oxygen (O)?
What is the electron configuration of oxygen (O)?
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