Final answer:
The chemical symbols for oxygen, iron, hydrogen, and helium are O, Fe, H, and He respectively. They are concise representations of these elements' names, with iron (Fe) being derived from its Latin name 'ferrum.'
Step-by-step explanation:
The chemical symbols for the elements oxygen, iron, hydrogen, and helium are O, Fe, H, and He, respectively. These symbols are used as a chemical shorthand in formulas and equations, and they typically consist of one or two letters. The first letter of a symbol is always capitalized, while any subsequent letter is lowercase. It's important to note that while elements like oxygen and hydrogen have symbols (O and H) that sound like their English names, some elements such as iron (Fe) have symbols derived from their Latin names—in this case, from 'ferrum.'
On the other hand, helium (He) and hydrogen (H) are examples of elements whose chemical symbols and English names are very closely related.