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5 cards from this section. Quick, good the night before a test.
Calculate the average atomic mass of chlorine from its isotopes: Cl-35 and Cl-37.
Remember to convert the percentages into fractions!
What defines an isotope?
Think about what makes elements the same and what gives them different masses!
What is the average atomic mass of chlorine with isotopes Cl-35 and Cl-37?
Use the weighted average approach!
True or False: The first ionization energy of magnesium is lower than that of sodium.
Think about the electron shielding effects!
If chlorine has 75.78% abundance of Cl-35 and 24.22% of Cl-37, calculate the average atomic mass.
Remember to convert percentages into fractions!
Discuss the physical meaning of ionization energy and why it increases across a period. Provide examples from periodic trends.
Think about how the number of protons affects attraction to electrons.
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