Neco 2021 Chemistry Question 21

Practice objective / multiple choice question 21 from the 2021 Neco Chemistry examination.

Neco 2021 Chemistry Objective / Multiple Choice Easy Difficulty
Question 21 NECO • 2021 • CHEMISTRY • objective
Neco 2021 Chemistry Question 21 diagram

The diagram shows a lithium atom with a nucleus containing 3 protons and 4 neutrons, and electron shells containing 2 electrons in the first shell and 1 electron in the second shell. Based on the diagram, state the atomic number (\(Z\)), mass number (\(A\)), and identify the element.

Answer Options

A. Atomic number Z = 3; mass number A = 8; element = Lithium (Li).
B. Atomic number Z = 2; mass number A = 7; element = Helium (He).
C. Atomic number Z = 4; mass number A = 8; element = Beryllium (Be).
Correct Answer D. Atomic number Z = 3; mass number A = 7; element = Lithium (Li).
Correct Answer
D
Correct Option:
Atomic number Z = 3; mass number A = 7; element = Lithium (Li).

About This Question

This is Neco 2021 Chemistry Question 21. It is one of the objective questions from the 2021 Neco Chemistry examination.

Difficulty level: Easy .

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