In this video Paul Andersen explains how elements and molecules are made of atoms. In a pure sample of a pure substance the average mass remains the same. If more than one atom is found in a molecule the ration of average masses...

Atomic Models: Centuries ago, people didn’t know exactly what was inside an atom, but they had some “ideas”. Around 400 BC, a Greek philosopher named Democritus came up with a theory that everything in the world was made of tiny...

Atomic Models: Centuries ago, people didn’t know exactly what was inside an atom, but they had some “ideas”. Around 400 BC, a Greek philosopher named Democritus came up with a theory that everything in the world was made of tiny...

In this section, I talk about elements, atoms and how they interact. I deal with two types of bonds: Covalent Bonds and Ionic Bonds. I also talk about pH, chemical reactions and metabolism.

In this video, the smallest particle of a chemical element, the atom, is discussed along with its various representations. The video provides information on the structure of atoms and their various components, including the nucleus,...

The ionisation energy decreases progressively as we move down the group. However, in the case of lead (Pb), the ionisation energy is higher than that of tin (Sn) due to inadequate shielding of the inner f-orbitals. This results in a...

In this video, we explore the importance of carbon, an element that is present in everything from the air we breathe to the objects we use daily.

You may have heard that carbon is the element of life. What does that mean? Let's find out!

This video provides an overview of the element fluorine, its properties, and its uses. Despite its reactivity, fluorine is used in dental care and pharmaceuticals due to its beneficial effects on teeth and its stable carbon-fluorine...

The number of protons in the nucleus of an atom.
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A Twig Science
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Let's take a look back at the elements sodium, oxygen, argon, arsenic, and zinc.

Let's take a look back at the elements helium, tin, calcium, palladium, and lead.

Let's take a look back at the elements nitrogen, mercury, copper, magnesium, and cobalt.

Let's take a look back at the elements silicon, fluorine, lithium, boron, and chromium.

Let's take a look back at the elements platinum, iodine, aluminum, iron, and tungsten.

Let's take a look back at the elements silver, hydrogen, phosphorous, germanium, and sulfur.

Let's take a look back at the elements chlorine, titanium, gallium, potassium, and nickel.

Learn the basics about what is an element? how is a mixture done? and what is a compound? Find out in this video!

Atoms can (and do) bond constantly; it's how they form molecules. Sometimes, in an atomic tug-of-war, one atom pulls electrons from another, forming an ionic bond. Atoms can also play nicely and share electrons in a covalent bond. From...

In this video Paul Andersen explains how chemical analysis is important in determining the composition, purity and empirical formula of a compound. An empirical formula determination problem is also included.

One of the most famous elements in the periodic table doesn't really belong anywhere chemists would like to put it.

Adamantium, bolognium, dilithium. Element Zero, Kryptonite. Mythril, Netherite, Orichalcum, Unobtanium. We love the idea of fictional elements with miraculous properties that science has yet to discover. But is it really possible that...

Explore the significance of chlorine, a chemical element commonly found in everyday life. We learn about its atomic number, symbol, and physical properties. The video also delves into the dangers of chlorine, particularly in the form of...

Oxygen is the chemical element with the symbol O and atomic number 8. Oxygen is a necessary and abundant resource on Earth. Learn about the many things oxygen is used for - including keeping humans alive!