Class 9 Courses

Class 9 Chemistry App's Tests

Class 9 Chemistry e-Book's MCQs - Complete

Atomic and Mass Number MCQ App Download & e-Book - 223

MCQ:

The number of protons and neutrons in the nucleus if the atomic number of an element is 17 and the mass number is 35, is

  1. 17 and 18
  2. 17 and 19
  3. 17 and 20
  4. 17 and 21

Class 9 Chemistry App & e-Book Tests PDF Download

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Atomic and Mass Number App (Android & iOS)

Atomic and Mass Number App (Android & iOS)

9th Grade Chemistry App (Android & iOS)

9th Grade Chemistry App (iOS & Android)

10th Grade Chemistry App (Android & iOS)

10th Grade Chemistry App (Android & iOS)

A level Chemistry App (Android & iOS)

A level Chemistry App (iOS & Android)