Igcse Model Questions Vol1 2020 Chemistry Question 20

Practice objective / multiple choice question 20 from the 2020 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2020 Chemistry Objective / Multiple Choice Easy Difficulty
Question 20 IGCSE_MODEL_QUESTIONS_VOL1 • 2020 • CHEMISTRY • objective
Igcse Model Questions Vol1 2020 Chemistry Question 20 diagram

The diagram shows a Bohr model of an element X. The first shell contains 2 electrons, the second shell contains 8 electrons, and the third shell contains 1 electron. Using this information, state the atomic number of X, identify the element, and give the number of valence electrons.

Answer Options

A. Atomic number 12; element Magnesium (Mg); 2 valence electrons.
B. Atomic number 10; element Neon (Ne); 0 valence electrons.
Correct Answer C. Atomic number 11; element Sodium (Na); 1 valence electron.
D. Atomic number 13; element Aluminum (Al); 3 valence electrons.
Correct Answer
C
Correct Option:
Atomic number 11; element Sodium (Na); 1 valence electron.

About This Question

This is Igcse Model Questions Vol1 2020 Chemistry Question 20. It is one of the objective questions from the 2020 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Easy .

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