All oxygen atoms have 8 protons and all sodium ... Note that you can work out the number of neutrons by subtracting the atomic number from the mass number. In this example, it is 35 – 17 ...

There are 118 elements in the periodic table, each with a unique symbol and atomic number. Symbol: A one or two-letter abbreviation used to represent the element. Atomic number: The number of ...

These rules help in identifying and writing chemical symbols consistently across all elements. The symbol serves as a shorthand notation for each element's name in formulas and equations, making ...