A representative particle is the smallest unit of a substance that can be broken down without altering the composition. Matter is composed of three types of representative particles: atoms, molecules and formula units.
Atoms and Elements
Atoms are the smallest particle that can be split. Substances that contain only one kind of atom are called elements.
Molecules
The molecule is the representative particle of molecular compounds. It is also the representative particle of diatomic elements.
Formula Unit
The representative particle of an ionic compound is the formula unit. A formula unit uses a formula to calculate the basic whole number ratio of the ions in an ionic compound.
Diatomic Elements
Diatomic elements, or molecules, are made up of two atoms of the same element. These diatomic elements are not part of a compound.
<span>2AlBr</span>₃<span>+ 3Cl</span>₂<span>--> 2AlCl</span>₃<span>+3Br</span>₂<span> </span>
Without units, the results of your measurement would be unclear and it would be hard to know what each seperate measurement is telling you.
<span>CH3COOH + NaOH = CH3COONa +H2O</span>
Here is the correct answer of the given question above. The principal reason that we must consider the uncertainty principle when discussing electrons and other subatomic particles, but not when discussing our macroscopic world is that photons of only certain allowed frequencies can be absorbed
or emitted as the electron changes energy state. Hope this answer helps.
