Neco 2021 Chemistry Question 1

Practice practical question 1 from the 2021 Neco Chemistry examination. This question covers Atomic Structure .

Neco 2021 Chemistry Practical

Topic: Atomic Structure

Question 1 NECO • 2021 • CHEMISTRY • practical

A sample of an unknown element X was analysed by a mass‑spectrometer. The instrument gave the following peaks for the isotopes of X:\n\n| Isotope (mass number) | Relative abundance (%) |\n|-----------------------|------------------------|\n| X‑28 | 62.0 |\n| X‑30 | 38.0 |\n\nThe atomic number of X is 14. Using the data above, answer the following:

( a )

Calculate the relative atomic mass of element X to two decimal places.

( b )

Write the ground‑state electron configuration of a neutral atom of X using the Aufbau principle.

( c )

State the number of neutrons present in the most abundant isotope of X.

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This is Neco 2021 Chemistry Question 1. It is one of the practical questions from the 2021 Neco Chemistry examination.

The question covers Atomic Structure .

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