The chemical symbol is X. It identifies the element. The superscript A represents the mass of the atom. The subscript Z represents the atomic number of the atom.
The chemical symbol X represents the element, which can be any chemical element found on the periodic table. Examples of chemical symbols include H for hydrogen, O for oxygen, and Fe for iron.
The superscript A represents the mass number of the atom. The mass number is the sum of the number of protons and neutrons in the atom's nucleus. For example, if a particular atom has 6 protons and 8 neutrons, its mass number would be 14. Therefore, the superscript A would be 14.
The subscript Z represents the atomic number of the atom. The atomic number is the number of protons in the atom's nucleus. It determines the element's identity and its position on the periodic table. For example, hydrogen has an atomic number of 1, oxygen has an atomic number of 8, and iron has an atomic number of 26.
In summary, the chemical symbol X represents the element, the superscript A represents the mass number of the atom, and the subscript Z represents the atomic number of the atom.