Assuming that you mean one molecule of epsom salts, the answer is:magnesium : 1
sulphur : 1
oxygen : 4.
same number of each element
each element has one atom of the element's name
In this case, the equation is balanced.
there are atoms inside of each element
It is important to know the relative number of atoms of each element in a compound for the chemical composition.
You can determine the number of atoms of each element in a compound by using the chemical formula of the compound. The subscripts in the formula indicate the number of atoms of each element. For example, in H2O (water), there are 2 hydrogen atoms and 1 oxygen atom.
The chemical formula shows you this. The subscripted number next to each element shows how many atoms are present in a molecule or formula unit. If no number is shown, then only one atom of that element is present.
In this case, the equation is balanced.
When all atoms in a substance are alike, the substance is an element. Each element is composed of atoms that have the same number of protons in their nucleus.
Atoms
The number of protons in the nucleus of its atoms, which is its atomic number, defines each element. However, the nuclei of a given element may have varying numbers of neutrons.
Each element is different so for a certain element to be define/determined it has different atoms to make it up so no other element has the same atoms