What are the simplest pure substances that cannot be broken down chemically into other substances?

There are about 100 or so , which are species with identical atomic numbers, $Z$, and which cannot be broken down by chemical means. Of course, some elements may be...

Elements in its purest form can no longer be broken down into any other substance. Hope this helps :)

A pure substance has definite physical and chemical properties....which include melting point, boiling point, (under given conditions),......... And examples of pure substances include all the , water, methane gas, sugar,...

An atom is the basic building block of matter. Everything is made up of atoms. Atoms have three different types of particles that can vary: protons, neutrons, and electrons. Atoms...

Heterogeneous solution - For example - Water and Octane Water cannot overcome the strong dispersion forces between octane molecule and also because non-polar and polar dont mix, hence stops...

On Mohs scale, isn't diamond assigned a $10$ on the basis of hardness? Halite is almost a purely ionic material.

Each water molecule contains two hydrogen atoms and one oxygen atom; two hydrogen-oxygen covalent bonds hold these atoms in place. Certain high-energy ultraviolet radiations carry sufficient amounts of energy to...

What does the $Delta$ symbol mean? Is the equation balanced with respect to mass and charge?

A decomposition reaction is a reaction where complex or molecules are broken down into simpler molecules. Usually, these reactions take a lot of activation energy to start the reaction, and...

The idea here is that you need to use the amount of hydrogen and the amount of carbon found in the $"5.0-g"$ sample of this unknown compound to determine the...