IGCSE O Level Chemistry MCQs - Chapter 14

Structure of Atom Trivia Questions and Answers PDF - 4

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Structure of Atom Questions & Answers PDF Download: MCQ Quiz 4

MCQ 16: 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

MCQ 17: 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

MCQ 18: If the nucleon number of potassium is 39, the number of neutrons will be

MCQ 19: First element in periodic table to have 8 valence electrons is

nitrogen
oxygen
fluorine
neon

MCQ 20: All are noble gases except

Helium
Neon
Argon
Xeon

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