There are seven elements that are always found as diatomic molecules. The first one is the first element Hydrogen; the rest form a 7 on the periodic table: Nitrogen, Oxygen, Fluorine across, then going down Chlorine (Cl), Bromine, Iodine.
Suggestable mnemonic : I Have No Bright Or Clever Friends
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Chemical formula or Chemical equation??
Many students get confused of chemical formula and chemical equation. Here, I will show a few examples of chemical formulae and equations and their descriptions. Hopefully, this will help you to distinguish between the two.
Chemical formula
A chemical formula tells us the composition of a compound in a short form but understandable to anyone with, at least, basic chemistry. We have a few types of chemical formulae such like :
Chemical equation
Meanwhile, a chemical equation describes a chemical reaction, which means it describes the interaction between reacting chemical substances (called reactants) to produce new chemical substances (called products). There are also a few types of chemical equations, namely :
Remember to balance the chemical equations every time you write them.
Chemical formula
A chemical formula tells us the composition of a compound in a short form but understandable to anyone with, at least, basic chemistry. We have a few types of chemical formulae such like :
Chemical equation
Meanwhile, a chemical equation describes a chemical reaction, which means it describes the interaction between reacting chemical substances (called reactants) to produce new chemical substances (called products). There are also a few types of chemical equations, namely :
Remember to balance the chemical equations every time you write them.
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