Chemistry Ch 2 Introduction - Interactive Learning
Chapter 2: Atomic Structure - 9th PTCB Chemistry 📚 9th Class PTCB Chemistry ⚛️ Chapter 2: Atomic Structure Understanding the Building Blocks of Matter 🧱 🔬 Interactive Atom Model - Real-World Visualization Hydrogen (H) Helium (He) Lithium (Li) Carbon (C) 1p⁺ Protons: 1 Neutrons: 0 Electrons: 1 ⏯️ Play/Pause ⚡ Change Speed 🎲 Show Uncertainty 🎯 Student Learning Outcomes After studying this chapter, students will be able to: Explain the structure of the atom as a central nucleus containing neutrons and protons surrounded by electrons in shells 🔮 State that orbits (shells) are energy levels of electrons and a larger shell implies higher energy and greater average distance from nucleus ⚡ State that electrons are quantum particles with probabilistic paths whose exact paths and locations cannot be mapped (uncertainty principle) 🎲 Explain that a nucleus is made up of protons and neutrons held together by strong nuclear force 💪 Explain that an atomic model is an aid to understand the structure of an atom 🏗️ State the relative charge and relative masses of subatomic particles 📊 Interpret the relationship between subatomic particles, their mass and charge ⚖️ Illustrate the path of charged particles in a Uniform Electric Field 🧲 Define proton number / atomic number as the number of protons in the nucleus 🔢 Explain that the proton number is unique to each element 🆔 State that radioactivity can change the proton number and alter an atom's identity ☢️ Define nucleon number / atomic mass as sum of protons and neutrons 📐 Define isotopes as different atoms of the same element with same protons but different neutrons 👯 Determine the number of protons and neutrons of different isotopes 🔍 Define relative atomic mass 📏 State that isotopes can exhibit radioactivity ⚡ Discuss importance of isotopes (carbon dating, medical imaging) 🏥 Describe the formation of cations and anions from atoms ➕➖ Interpret and use symbols for atoms and ions 📝 Calculate relative atomic mass from isotope abundances 🧮 📖 Introduction and Physical Properties Elements are very different from one another. A large number of elements exist as solids 🪨, very few are present as liquids 💧, while the rest exist as gases 💨. All these elements are however made up of atoms! ⚛️ 🤔 Think About It! Have you ever thought why these elements are so different from one another? 🟡 Sulphur looks very different from Gold 🥇 🥇 Gold is very different from Bromine 🟤 ⚫ Iron is a heavy metal ⚖️ ⚪ Aluminium and Zinc are light metals 🪶 ✨ Key Point Metals are mostly lustrous (shiny) ✨ while non-metals like sulphur and carbon appear dull. 🌑 💡 The difference in the properties of elements is due to the difference in the properties of their constituent atoms! Fig (2.1) Different Elements Look Different 🟡 Sulphur Yellow solid 🥇 Gold Shiny metal 🟤 Bromine Red-brown liquid ⚫ Iron Heavy metal ⚪ Aluminium Light metal 🔘 Zinc Light metal Various elements showing different physical appearances an...
Subject: Chemistry 9th New Ptcb | Chapter: Chapter 2: Atomic Structure