The Group 14 elements show a change from non-metallic to metallic character down the group. Fig. 3.1 shows a sketch of some of the ionisation energies of silicon, Si . Fig. 3.1 (i) Complete the graph in Fig. 3.1 to show the third to sixth ionisation energies of Si . (ii) Construct an equation to represent the second ionisation energy of Si. .................................................................................................................................

Chemistry

IGCSE&ALevel

CAIE

Exam No：9701_w24_qp_23 Year：2024 Question No：3(c)

Answer:

Knowledge points:

1.4.1 define and use the term first ionisation energy, IE

1.4.2 construct equations to represent first, second and subsequent ionisation energies

1.4.3 identify and explain the trends in ionisation energies across a period and down a group of the Periodic Table

1.4.4 identify and explain the variation in successive ionisation energies of an element

1.4.5 understand that ionisation energies are due to the attraction between the nucleus and the outer electron

1.4.6 explain the factors influencing the ionisation energies of elements in terms of nuclear charge, atomic/ionic radius, shielding by inner shells and sub-shells and spin-pair repulsion

1.4.7 deduce the electronic configurations of elements using successive ionisation energy data deduce the position of an element in the Periodic Table using successive ionisation energy data

Answer:

Knowledge points:

Solution:

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