Neco 2023 Chemistry Question 1

Practice essay / theory question 1 from the 2023 Neco Chemistry examination. This question covers Atomic Structure .

Neco 2023 Chemistry Essay / Theory

Topic: Atomic Structure

Question 1 NECO • 2023 • CHEMISTRY • essay

The diagram shows a Bohr model of a neutral atom of an element X. The nucleus contains 15 protons and 15 neutrons. The electron shells are labelled K, L and M. The K‑shell holds 2 electrons, the L‑shell holds 8 electrons and the M‑shell holds 5 electrons.

( a )

State the atomic number, mass number and the number of neutrons in the atom.

( b )

Write the ground‑state electron configuration of element X using the Aufbau principle (list the distribution of electrons in shells).

( c )

Identify the group (family) and period of element X in the periodic table and give one characteristic property of this group.

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This is Neco 2023 Chemistry Question 1. It is one of the essay questions from the 2023 Neco Chemistry examination.

The question covers Atomic Structure .

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