States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
What is a molecular element?
A compound refers to the molecule which contains at least two different type of elements bonded together. All the compounds that we study can be referred to as molecules, but all the molecules are not compounds. Example of Compounds are NaCl and H2O.
For example Br2 (Bromine) , H2 (Hydrogen),O2(Oxygen), and N2(Nitrogen) are not compounds but they can be regarded as molecular elements. The reason is that all of them are not composed of two different elements but contain the same elements.
An atomic element is the one which exists independently as atom and is able to react with other elements to form various compounds.
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