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Atoms and Molecules - what is the difference??
Atoms are the basic building blocks of all matter and they are very very small. They are made up of protons, neutrons and electrons and they are the smallest unit of matter that still retains the basic properties of an element. Molecules...
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Chemistry - The Mole Explained - What is Avogadro's Number?!
Understanding the mole and how to use it is essential to your success in chemistry. The mole just represents the amount of a substance. 1 mole of anything is equal to 6.02 x 10^23 which is known as Avogadro's number. This number tells us...
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Why is the Periodic Table Shaped the Way It Is? Is an Alternative Periodic Table Better?
Why is the Periodic Table Shaped the Way It Is? Is an Alternative Periodic Table Better?
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Atomic number, Atomic mass, Mass number: What's the difference?
In this educational video, we will explore the differences between atomic number, atomic mass, and mass number in the world of chemistry.
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Bohr's Atomic Model: Electrons in Orbit
In 1913, Niels Bohr proposed an atomic model that dramatically altered our comprehension of atomic structure by establishing a novel framework for describing the arrangement and behaviour of electrons within an atom. The purpose of...
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Drawbacks of Rutherford's Theory
Rutherford's Nuclear Model: Limitations and Developments • Stability of Electrons in Orbit: The model failed to account for the continuous emission of electromagnetic radiation, indicating a flaw in the model. • Inability to Explain...
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Dalton's Vision: The Birth of Atomic Theory
In 1803, John Dalton formulated his renowned theory of atoms. The principal tenets of his theory were as follows: ₷ Atoms were thought to be the smallest, hardest, densest, and indivisible particles of matter. Every element is made up of...
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Understanding Interstitial Defects Hidden Spaces
Imperfections in solids are irregularities or deviations from the ideal arrangement of atoms or molecules in a crystalline solid structure. These defects can occur during the crystallization process when the rate of crystal formation is...
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Atoms and Ions Explained - What's the difference?
In this video, we'll explore what atoms and ions are, and what the differences are. We'll also talk about how they're used in chemistry and physical science. If you're curious about what atoms and ions are, and what the differences are,...
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What is an atom made of
What is an atom? And what is it made of? In this video, I will be introducing you to the atom. We will also look at concepts like atomic mass, elements and isotopes.
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What are carbon-based molecules
Carbon-based molecules are the basis of life as we know it. Molecules like lipids, proteins, nucleic acids, and carbohydrates that make up all living things have one thing in common - carbon.
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What the heck is an ELEMENT in chemistry?
In chemistry, we usually talk about atoms and molecules. When we introduce the term 'element', things get a little confusing. In this video, we will cover what an element is in chemistry and give you some examples.
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Number of atoms in a simple cubic unit call and Body Centred cubic unit cell
Number of atoms in a simple cubic-centered & Body Centred cubic unit cell. A simple cubic unit cell has one atom at each of the eight corners of the cube, with each atom shared between the eight cells. The total number of atoms in the...
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Atoms in Hexagonal Harmony HCP Unit Cells
Atoms in Hexagonal Harmony: HCP Unit Cells" The HCP unit cell has a total of 6 atoms, with 6 corner atoms in the top layer and 6 in the bottom layer. Each corner atom is shared between 6 unit cells, contributing 1/6 of an atom to each...
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Aufbau Principle: Building Electron Configurations
An important idea in atomic theory is the Aufbau Principle, which shows how electrons are arranged in an atom. It says that electrons fill atomic orbitals from least energetic to most energetic, starting with the least energetic orbitals...
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Electron Energy: Deriving the Expression
Bohr's model of the atom says that an electron's energy is set by its orbit around the nucleus. Bohr said that electrons have specific, quantised levels of energy, and that the size of the orbit affects the energy level. An electron's...
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Hydrogen's First Orbit: Measuring the Radius
The Bohr radius, which represents the radius of hydrogen's first orbit, is a fundamental concept within Bohr's atomic model. According to this model, electrons revolve around the nucleus in quantised orbits with precise and unchanging...
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Atomic Orbits: Calculating the Radius
Bohr's atomic model postulates that the radius of an electron's orbit around the nucleus is determined by the concept that electrons travel in quantised orbits with distinct and well-defined radii. According to the model, the angular...
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Rutherford's Atomic Revelation: The Nuclear Model
Ernest Rutherford's Nuclear Model of the Atom: A Transformative Journey Background and Experiment • J.J. Thomson's Plum Pudding Model, a sphere of diffuse positive charge with negatively charged electrons, was the dominant model before...
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Rutherford's Gold Foil Experiment: Peering into the Nucleus
Ernest Rutherford's Gold Foil Experiment: A Revolutionary Study Background and Experiment Design • Rutherford and his colleagues conducted an experiment to probe the structure of the atom. • The experiment involved alpha particles, a...
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Discovery of Proton & Neutron
Discovery of the Proton and Neutron Background: • J.J. Thomson's 1897 discovery of the electron led to the development of atomic models. • Ernest Rutherford's Gold Foil Experiment (1911) revealed the presence of a dense, positively...
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Thomson's Model of Atom: The Plum Pudding Model & Radioactivity
Thomson's Plum Pudding Model and Radioactivity Discovery Background: • Atoms were previously thought to be indivisible particles, as proposed by John Dalton. • The discovery of the electron, a subatomic particle, required a new model to...
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J.J. Thomson's Charge-to-Mass Ratio Experiment
In 1897, J.J. Thomson conducted an experiment that led to the discovery of the electron and revolutionized atomic theory by demonstrating that atoms are composed of smaller subatomic particles. Before this, atoms were considered...
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Fundamental unit of matter - Atom
Understanding Atoms in Chemistry and Physics • Atoms are fundamental building blocks of matter. • Understanding atoms is crucial for chemistry and physics principles. • The concept of atoms dates back to ancient Greece. • Scientific...