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Learn: Atomic Structure and the Periodic Table
AQA GCSE Chemistry 8462 specification
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Welcome!Today we'll explore atomic structure and the periodic table. This topic is essential for understanding how elements behave and interact.
What is an Atom?An atom is the smallest unit of an element that retains its chemical properties. It consists of a nucleus (protons and neutrons) surrounded by electrons.
Subatomic ParticlesAtoms are made of protons (positive charge), neutrons (neutral), and electrons (negative charge). Protons and neutrons are found in the nucleus, while electrons orbit around it.
Which particle has a positive charge?
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What are Isotopes?Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons. This means they have different masses but the same chemical properties.
An isotope of an element has the same number of {{blank0}} but a different number of {{blank1}}.
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Electronic ConfigurationElectronic configuration describes how electrons are arranged in shells around an atom's nucleus. The first shell can hold 2 electrons, and the second can hold up to 8.
Match the items on the left with their correct pairs on the right
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The Periodic TableThe Periodic Table organises elements by increasing atomic number. Elements in the same group have similar properties due to their electronic configuration.
What determines an element's position in the periodic table?
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Groups and PeriodsGroups are vertical columns in the periodic table; elements in the same group have similar chemical properties. Periods are horizontal rows, showing a gradual change in properties across the row.
Which of the following are true about the periodic table? (Select all that apply)
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Review Time!Great work! You've learned about atoms, isotopes, electronic configurations, and the periodic table. Now let's test your understanding with a few questions.
What is the smallest unit of an element?
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Elements in the same {{blank0}} have similar chemical properties.
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Match the items on the left with their correct pairs on the right
Start the lesson to answer this matching question
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