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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 helps us understand the building blocks of matter and how elements are organised. Let's get started!
What is Atomic Structure?Atomic structure describes how atoms are built. An atom is made up of three main subatomic particles: protons, neutrons, and electrons. Protons and neutrons are found in the nucleus, while electrons orbit around it.
Which part of the atom contains protons and neutrons?
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Subatomic ParticlesAtoms consist of protons (positive charge), neutrons (no charge), and electrons (negative charge). Protons determine the element, while electrons affect chemical behaviour. For example, hydrogen has 1 proton and 1 electron.
The {{blank0}} has a positive charge, while the {{blank1}} has a negative 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. For example, carbon-12 and carbon-14 are isotopes of carbon. Isotopes can be stable or radioactive.
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 atomic number (number of protons). Groups contain elements with similar properties, while periods show increasing atomic number. For example, Group 1 elements are highly reactive metals.
What does the atomic number represent?
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Electronic ConfigurationElectronic configuration describes how electrons are arranged in shells around the nucleus. For example, sodium (Na) has 11 electrons arranged as 2,8,1. This explains chemical reactivity and bond formation.
The electronic configuration of sodium is {{blank0}}, {{blank1}}, {{blank2}}.
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Review Time!Great work! We've covered atomic structure, subatomic particles, isotopes, the periodic table, and electronic configurations. Let's test your understanding with a few questions.
Which of the following are true about atoms? (Select all that apply)
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Match the items on the left with their correct pairs on the right
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What does the group number of an element indicate?
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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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