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Learn: Atomic Structure
AQA Chemistry 7405
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Welcome!Today we'll explore Atomic Structure, a fundamental concept in chemistry. Understanding this helps explain how elements behave and interact.
What is Atomic Structure?Atomic structure refers to how atoms are built. Atoms consist of protons, neutrons, and electrons. Their arrangement determines the properties of elements.
Proton and Mass NumbersThe atomic (proton) number is the number of protons in an atom. It defines the element. The mass number is the sum of protons and neutrons, showing an atom's mass.
Quick check: What does the atomic number represent?
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IsotopesIsotopes are atoms of the same element with different numbers of neutrons. This means they have the same atomic number but different mass numbers.
An isotope has the same {{blank0}} number but a different {{blank1}} number.
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TOF Mass SpectrometryTime-of-flight (TOF) mass spectrometry is used to measure the mass of particles. It involves ionising atoms, accelerating them, and measuring their flight times to determine their mass-to-charge ratio.
What does TOF mass spectrometry measure?
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Interpreting Mass SpectraMass spectra display the results of TOF mass spectrometry. Peaks show the relative abundance of ions with different mass-to-charge ratios.
Match the items on the left with their correct pairs on the right
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Review Time!Great work! You've learned about atomic structure, isotopes, TOF mass spectrometry, and mass spectra. Let's test your knowledge!
Which of the following are true about isotopes? (Select all that apply)
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Match the items on the left with their correct pairs on the right
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Well done!You've completed the lesson on atomic structure. Keep practising to master these concepts!
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