IGCSE O Level Chemistry MCQs - Chapter 14
Structure of Atom Trivia Questions & Answers PDF Download - 4
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Structure of Atom Exam Questions and Answers PDF Download: Test 4
In an atom, the number of protons and neutrons are added to obtain
- number of electrons
- number of nucleons
- atomic number of element
- number of positrons
If the proton number is 19, the electron configuration will be
- 2,8,7
- 2,8,18
- 2,8,8,1
- 2,8,8,3
If the nucleon number of potassium is 39, the number of neutrons will be
- 39
- 19
- 20
- 29
First element in periodic table to have 8 valence electrons is
- nitrogen
- oxygen
- fluorine
- neon
All are noble gases except
- Helium
- Neon
- Argon
- Xeon
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