Teacha
  • Courses
  • Mock Exams
  • For Tutors
  • For Schools
  • Pricing
Log InStart Free
  1. Past Questions
  2. /
  3. UI
  4. /
  5. Chemistry
  6. /
  7. 2019/2020
  8. /
  9. Q19
Question 19

Chlorine, consisting of two isotopes of mass numbers 35 and 37, has an atomic mass of 35.5. The relative abundance of the isotope of mass number 37 is

  • A.20
  • B.25
  • C.50
  • D.75
Objective

Question details

Exam body
UI
Subject
Chemistry
Year
2019/2020
Question no.
#19
Type
Objective
Previous · Q18CH 4 has this geometry: Next · Q20 Elements P, Q, R, S, have 6, 11, 15 and 17 electrons respectively, therefore

More from this paper

  • Q15Given the change of phase: CO2(g) changes to CO2(s), the entropy of the system
  • Q16A pure solid usually melts .........
  • Q17A small quantity of solid ammonium chloride was heated gently in a test tube…
  • Q21Which of the following is the pH of a strong alkali?
  • Q22In an electrolytic cell the electrode at which the electrons enter the solution…
  • Q23the ionic radii of metals are usually
See all Chemistry 2019/2020 questions
Teacha

Africa's learning & exam readiness platform. Built for students, tutors, and schools.

Platform

  • Courses
  • Mock Exams
  • Past Questions

For You

  • I'm a Tutor
  • I'm a School
  • Pricing

© 2025 Teacha. Built for African learners, tutors, and schools. Teacha is not affiliated with WAEC, NECO, or JAMB. All past questions are sourced from publicly available materials.

Privacy PolicyTerms of UseCookie Policy