Why do you need to know the 7 diatomic molecules?

Answer 1

Because the Hydrogen element only exists in nature by its self as a molecule with TWO hydrogen atoms. So if you have a sample of hydrogen, each hydrogen atom will be H2 (not just H). That is why it is called a Di-(two)-atomic-(atoms) molecule. Hope this helps.

Answer 2

seven elements, the "HONClBrIF" twins are all more stable as paired atoms rather than existing as single atoms like all the other Periodic Table atoms. They can be singles at high temperatures or unusual circumstances, or in compounds, but when they are in their pure forms at normal temps and pressures, they are paired up.

Answer 3

Because two individual atoms of the elements with diatomic molecules can lower their total free energy by combining to form a diatomic molecule, and there is no adequate kinetic barrier to the combination.

Answer 4

There are many, many more than seven diatomic molecules! but only 7 diatomic elements: H2, O2, Cl2, I2 etc. So to be a good chemist, just learn them and then you might understand the difference with other diatomic molecules NOT being elements (but compounds): CO, FeS, CuO, HF, NaI, RbCl, etc. etc.

Answer 5

The seven diatomic molecules are called 'diatomic' because each molecule, instead of being just one atom by itself, is composed of two atoms. For instance: H2 vs Br

Answer 6

Diatomic molecules have two elements (of the same type or different type) as are considered as molecules and not elements.

Answer 7

Group 7 elements are very reactive and unstable themselves. When they are unable find another element to form bond with, they form bond with another atom of their own kind e.g. h takes another h and forms h2.That bond is covalent where each give one electron and thus they share both those electrons.