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What is Matter
New ReviewThis video introduces atoms, molecules, and the big bang theory that proposes the creation of matter.
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How Atomic Bombs Work—and Why Few Nations Have Them
New ReviewAt 5:30AM, dawn on July 16, 1945 near a small town called Alamagordo New Mexico, the course of human history was changed. The first atomic bomb was detonated that day, and sealed the fate of humanity. It took the work of many people to...
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Where Did Earth’s Water Come From? Scientific Origins of Water
New ReviewWater on earth is found in all three forms. But how did water get on earth? Where did the water on earth come from? The earth has an estimated 325 million trillion gallons of it. But earth began as a barren, lifeless, waterless ball of...
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How to Understand Atoms
Howcast - The structure of atoms determines their physical and chemical properties. Using these guidelines, you can understand why some atoms are reactive and others are not.
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BioShock Infinite Walkthrough Part 27
Howcast - Would you kindly check out part 27 of our walkthrough for BioShock Infinite, the new first person shooter by Irrational Games?
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CERN at 70: The cradle of the Higgs boson and World Wide Web looks to the future
Started in 1954, the 7,000 scientists at the European Centre for Nuclear Research (CERN) are focused on the innovations and discoveries of the future.
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Static electricity: charge
Pupil outcome: I can describe what charges are and how they are transferred between some objects, giving them opposite charges. Key learning points: - Atoms contain positive and negative electric charges. - The particles in atoms with a...
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Element Notation - Symbolic Notation vs. Isotope Notation - what's the difference?
In this video, we'll be looking at the different types of notation and how they're used to represent the atomic structure of elements. We'll be using both symbolic and isotope notation to show the different properties of the elements. If...
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The only isotope video you need to watch
Isotopes are just different atoms that represent the same element but have a different mass. In this video, students will learn what is an isotope and how to tell the difference between isotopes of different atoms. This video will make...
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Drawing Bohr Models of Atoms and Ions - 3 easy steps!
While While the Bohr model of the atom is not the most accurate model we have today, it can help up show a lot of valuable information about the atom. Bohr models can show the protons and neutrons in the nucleus along with the number of...
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Why do covalent compounds share electrons?
A covalent compound forms when electrons are shared and this will happen when you have 2 nonmetals, or 2 anions, bonding together. The reason these elements share their electrons is because they have a small difference in...
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Elements and Compounds - what's the difference?
In this video, we're going to talk about the difference between elements and compounds. We'll cover the basics of chemistry, and explain the differences between elements and compounds. If you're new to the subject of chemistry, or if...
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Unveiling the SECRETS of Atomic Structure!
In this video, students will learn about atomic theory, atomic structure and how the atom is put together. This will include learning about the different subatomic particles, protons, neutrons and electrons, that make up the atom! This...
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Determining the Number of protons, neutrons and electrons in an ATOM
In this video, we're going to learn about the number of p, n and e in an atom. We'll explore the atomic structure of different elements, and see how the number of protons, neutrons and electrons affects the properties of those elements....
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Protons, Neutrons and Electrons Explained - what's the difference?
In this video, we'll explore the differences between the proton, neutron, and electron. We'll learn about their characteristics, and how they interact with matter. This video is perfect for anyone who wants to learn more about subatomic...
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How to Determine the Number of protons, neutrons and electrons in an ION
In this video, we'll be talking about how to determine the number of protons, neutrons, and electrons in an ion. We'll be using the periodic table to help us out, so don't miss it! If you're looking to learn about atomic and nuclear...
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Molecules, compounds and types of chemical bonds
What is the difference between a molecule and a compound? What are the main types of chemical bonds? In this video, we will be answering those questions and more.
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Chemistry - Electron Configuration for Ions
Electron Configurations are essential to chemistry and they help us better understand and explain the position/location of electrons. Writing electron configurations can be daunting at first but once you see the pattern, you will be able...
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Pauli's Exclusion Principle: The rule of electrons
Wolfgang Pauli's Exclusion Principle, developed in 1925, is a crucial concept in quantum mechanics. It states that two electrons in the same atom cannot have the same set of quantum numbers, which are the principal quantum number (𝑻n),...
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Principal Quantum Number: The Key to Electron Shells
The principal quantum number (𝑛) is a fundamental parameter in quantum mechanics that determines the size and energy level of an electron's orbit within an atom. It is a positive integer that represents the main energy level or shell in...
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Stern-Gerlach Experiment and spin quantum number : Revealing Electron Spin
The Stern-Gerlach experiment, which took place in 1922, was the most important proof that electrons have spin and that they have a spin quantum number. A stream of silver atoms was sent through an experiment using a magnetic field that...
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Azimuthal Quantum Number: Shaping Electron Orbits
Characterised by the symbol 𝑙l, the azimuthal quantum number is a fundamental parameter in quantum mechanics that describes the angular momentum and form of an electron's orbital within an atom. The integer values it accepts range from 0...
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Cations and Anions Explained - What's the difference?!
Ions are all around you and in many of the products and substances you encounter on a daily basis. Being able to determine the identity and difference between cations and anions is important for success in chemistry and physical science....