Class 9 Courses

Class 9 Chemistry App's Tests

Class 9 Chemistry e-Book's MCQs - Complete

Periodicity and Properties MCQ App Download & e-Book - 219

MCQ:

The decrease in the force of attraction between valence electrons and nucleus by inner electrons is called

  1. screening effect
  2. shielding effect
  3. photoelectric effect
  4. dopler effect

Class 9 Chemistry App & e-Book Tests PDF Download

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Periodicity and Properties App (Android & iOS)

Periodicity and Properties App (Android & iOS)

9th Grade Chemistry App (Android & iOS)

9th Grade Chemistry App (iOS & Android)

SAT Chemistry App (Android & iOS)

SAT Chemistry App (Android & iOS)

A level Chemistry App (Android & iOS)

A level Chemistry App (iOS & Android)