8. Europium is the element responsible for the red phosphors in a colour TV screen. The mass spectrum of the isotopes of europium is shown below. (a) How many protons are there in an atom of the most abundant isotope? (b) How many neutrons are there in an atom of the most abundant isotope? (c) How many electrons are there in an atom of the most abundant isotope? (d) If the mass of one isotope is 150.91985 amu and the mass of the other isotope is 152.92122 amu, calculate the atomic weight of europium and report it to the correct number of significant figures based on the data given.

8. Europium is the element responsible for the red phosphors in a colour TV screen. The mass spectrum of the isotopes of europium is shown below. (a) How many protons are there in an atom of the most abundant isotope? (b) How many neutrons are there in an atom of the most abundant isotope? (c) How many electrons are there in an atom of the most abundant isotope? (d) If the mass of one isotope is 150.91985 amu and the mass of the other isotope is 152.92122 amu, calculate the atomic weight of europium and report it to the correct number of significant figures based on the data given.

Living By Chemistry: First Edition Textbook

1st Edition

ISBN:9781559539418

Author:Angelica Stacy

Publisher:Angelica Stacy

ChapterU1: Alchemy: Matter, Atomic Structure, And Bonding

SectionU1.14: Isotopia: Stable And Radioactive Isotopes

Problem 1TAI

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