A CHEMICAL SHOWS THE TYPES OF WHAT ATOMS IN THE SMALLEST REPRESENTATIVE UNIT OF A SUBSTANCE?
Not sure that I understand the question.
"In chemistry and physics, an atom is the smallest particle still characterising a chemical element."
It is possible to have a long discussion over how many atoms (1,2 etc) of a chemical element might be required to demonstrate properties characterising an element.
a chemical formula shows the types and_ of atoms in the smallest representative unit of a substance
The chemical formula of a substance shows the types of atoms present in the smallest representative unit of that substance. The smallest representative unit might be a molecule, an ion, or an individual atom depending on the nature of the substance.
To determine the types of atoms in the smallest representative unit of a substance, you can follow these steps:
1. Identify the chemical formula of the substance. The chemical formula provides information about the types and the number of atoms in the substance.
2. Determine the elements present in the chemical formula. Each element is represented by a specific symbol, such as H for hydrogen, O for oxygen, or C for carbon.
3. Count the number of atoms for each element in the formula. The subscript numbers written after the element symbol represent the number of atoms for that element. For example, in the chemical formula H2O, there are 2 hydrogen atoms (H) and 1 oxygen atom (O).
By analyzing the chemical formula, you can identify the types of atoms present in the smallest representative unit of the substance.