PLEASE HELP ME WITH THESE TWO QUESTIONS. THANK YOU IN ADVANCE. QUESTION 2 An isotope has 40 protons and 50 neutrons. Choose the correct values of the atomic number Z and the mass number A for this isotope. A) Z=50; A=40 B) Z=50; A=90 C) Z=40; A=50 D) Z=40; A=90 QUESTION 3 Given a half-life of a radioactive source, X is 40 years. Calculate the percentage remaining of X after 80 years?

PLEASE HELP ME WITH THESE TWO QUESTIONS. THANK YOU IN ADVANCE. QUESTION 2 An isotope has 40 protons and 50 neutrons. Choose the correct values of the atomic number Z and the mass number A for this isotope. A) Z=50; A=40 B) Z=50; A=90 C) Z=40; A=50 D) Z=40; A=90 QUESTION 3 Given a half-life of a radioactive source, X is 40 years. Calculate the percentage remaining of X after 80 years?

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter5: Radiation And Spectra

Section: Chapter Questions

Problem 25E: What are the three isotopes of hydrogen, and how do they differ?

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What are the three isotopes of hydrogen, and how do they differ?
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