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1.4 Ionisation energy · Fathom

1 Atomic structureAS Level

1.4 Ionisation energy

8 of 8 objectives have lessons · 0 studied · 0 secure

Lessons

Ionisation energy and what controls itThe definition of first ionisation energy, equations for first, second and later ionisations, and the four factors that decide how big it is. 4 min, not started
Ionisation energy trends in the Periodic TableWhy first ionisation energy falls down a group and rises across a period, and the two dips (groups 13 and 16) that break the pattern. 5 min, not started
Successive ionisation energiesWhy each successive ionisation energy is larger, what the big jumps mean, and how to read an element's group and configuration from the data. 5 min, not started

Syllabus objectives

8 objectives

What Cambridge says you should be able to do, in our words. Codes are the topic number plus the objective’s position.

1.4.1

Define and use the term first ionisation energy, IE.

Scope for all of 1.4: every atom or ion described is in its ground state, and only the elements hydrogen to krypton are assessed.

Taught in: Ionisation energy and what controls it · 2 questions

1.4.2

Construct equations to represent first, second and subsequent ionisation energies.

Scope for all of 1.4: ground-state atoms and ions only; elements hydrogen to krypton only.

Taught in: Ionisation energy and what controls it · 2 questions

1.4.3

Identify and explain the trends in ionisation energies across a period and down a group of the Periodic Table.

Scope for all of 1.4: ground-state atoms and ions only; elements hydrogen to krypton only.

Taught in: Ionisation energy trends in the Periodic Table · 6 questions

1.4.4

Identify and explain the variation in successive ionisation energies of an element.

Scope for all of 1.4: ground-state atoms and ions only; elements hydrogen to krypton only.

Taught in: Successive ionisation energies · 4 questions

1.4.5

Understand that ionisation energies arise from the attraction between the nucleus and the outer electron.

Scope for all of 1.4: ground-state atoms and ions only; elements hydrogen to krypton only.

Taught in: Ionisation energy and what controls it · 2 questions

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.

Scope for all of 1.4: ground-state atoms and ions only; elements hydrogen to krypton only.