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In Course: GCSE Physics (AQA): Paper 1

AQA GCSE Physics: Atomic Structure and Isotopes

Covers the modern model of the atom, including protons, neutrons, and electrons and their relative charges and masses. Defines atomic number and mass number, and explains the concept of isotopes. Also covers the historical development of the atomic model from Dalton to Bohr.

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Deck Contents

40 Cards
Lesson#1
In this deck, we'll explore the tiny world of atoms. You'll learn about the particles that make up an atom, how we define different elements and isotopes, and how our understanding of the atom has changed over time, from early ideas to the model we use today.
Lesson#2
Let's start with the modern model of the atom. At the centre of every atom is a tiny, dense nucleus. This nucleus contains two types of particles: protons and neutrons. Orbiting the nucleus in distinct energy levels, or shells, are much smaller particles called electrons.
Quiz#3
What is the name for the dense centre of an atom?

the nucleus

Quiz#4
What two types of subatomic particle are found in the nucleus of an atom?

protons and neutrons

Quiz#5
What type of subatomic particle orbits the nucleus in shells?

electrons

Lesson#6
The three subatomic particles have specific relative masses and charges. Protons have a relative charge of plus one. Electrons have a relative charge of minus one. Neutrons, as their name suggests, are neutral, with a relative charge of zero. Because an atom has an equal number of protons and electrons, its overall charge is zero.

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