Neco Model Questions Vol1 2021 Chemistry Question 2

Practice practical question 2 from the 2021 Neco Model Questions Vol1 Chemistry examination. This question covers Periodic table, Trends in ionisation energy, Electronic configuration, Periodic properties .

Neco Model Questions Vol1 2021 Chemistry Practical
Topics: Periodic table Trends in ionisation energy Electronic configuration Periodic properties
Question 2 NECO_MODEL_QUESTIONS_VOL1 • 2021 • CHEMISTRY • practical

The first ionisation energies (IE) of the elements in the third period were measured and are given in the table below. | Element | Symbol | First IE (kJ mol⁻¹) | |---------|--------|----------------------| | Sodium | Na | 496 | | Magnesium| Mg | 738 | | Aluminium| Al | 578 | | Silicon | Si | 789 | | Phosphorus| P | 1012 | | Sulphur | S | 1002 | | Chlorine| Cl | 1251 | | Argon | Ar | 1521 | Answer the following questions.

Question Parts

( a )
Calculate the average increase in first ionisation energy from sodium to argon across the period.
( b )
Explain the general trend in the values of IE across the period, citing electronic configurations where relevant.
( c )
Predict the first ionisation energy of potassium (K) and justify your prediction using periodic trends.
( d )
Identify any anomalous IE values in the table and provide a brief explanation for each anomaly.

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About This Question

This is Neco Model Questions Vol1 2021 Chemistry Question 2. It is one of the practical questions from the 2021 Neco Model Questions Vol1 Chemistry examination.

The question covers Periodic table, Trends in ionisation energy, Electronic configuration, Periodic properties .

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