WAEC SSCE Physics

Structure of the nucleus

Study notes for Structure of the nucleus — part of the WAEC SSCE Physics syllabus. 1 learning objectives with explanations and exam tips.

Objectives1
SubjectPhysics
ExamWAEC SSCE
Study Notes
Objective 1 of 1
The Nucleus and What It Contains

At the centre of every atom sits a tiny nucleus, packed with almost all the atom's mass. Think of it like the kernel inside a mango seed—small but very important. The nucleus contains two types of particles working together: protons and neutrons.

Protons are positively charged particles, while neutrons have no electrical charge. They stick together tightly through a powerful nuclear force. The number of protons determines which element an atom is. For example, uranium nuclei found in Nigerian uranium deposits contain 92 protons, making uranium unique. Neutrons add extra mass without changing the element's identity.

Together, protons and neutrons are called nucleons. The mass number of an atom equals the total nucleons present. Understanding this composition helps explain why different elements behave differently in nuclear reactions used in medicine and energy production.

💡 Exam tip: Remember that the nucleus is incredibly small but contains nearly all the atom's mass, and always distinguish between protons (charged) and neutrons (uncharged) when answering questions.
Frequently Asked Questions
How many WAEC objectives are in Structure of the nucleus?
The WAEC SSCE Physics topic 'Structure of the nucleus' has 1 learning objectives you must master.
Does Structure of the nucleus appear in WAEC Physics exams?
Structure of the nucleus is part of the official WAEC SSCE Physics syllabus, so questions can be drawn from it in any year.
How do I study Structure of the nucleus for WAEC?
Study each of the 1 objectives listed above. For each one, understand the concept, learn one worked example, and practise past questions on the topic.
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