You do not write a subscript because it is understood to be one. For example, the formula for water, H2O, indicates that there are two hydrogen atoms and one oxygen atom in a molecule of water. There is no subscript written next to the oxygen atom because it is understood to be one.
i don't know about 2
there is only one atom of each element
There is one atom of that element in the molecule.
an element is a substance rested with only one and ONE substance
an element consists of only 1 type of atom !
It means that you have one atom of each element in the formula
there is only one atom of each element
There is one atom of that element in the molecule.
there is only one atom of each element
There is one atom of that element in the molecule.
i don't know about 2
there is only one atom of each element
there is only one atom of each element
There is one atom of that element in the molecule.
The meaning is that only one atom of this element exist in the molecule. Example: sodium chloride - NaCl.
An Element is the substance consisting of only one type of atom
By definition, an Element contains only one kind of atom - atoms of that element. If it has more than one kind, it is a compound, not an element.