Iron and copper.
No, not all elements are abbreviated with one or two letters. Some elements have three-letter abbreviations, such as uranium (U) and tungsten (W), while others have four-letter abbreviations, such as livermorium (Lv) and seaborgium (Sg).
There are two atoms of Bromine (Br) and one atom of Copper (Cu) in this compound. Thus, there are two elements, but three atoms.
Examples: argon, nitrogen.
Syntax and morphology
Grasshoppers have TWO COMPOUND EYES AND THREE SIMPLE EYES.
Iron and copper.
There are two elements in sulfur dioxide (SO2): one sulfur and two oxygen.
There are two elements in sulfur dioxide (SO2): one sulfur and two oxygen.
Tuataras have only two eyes.
The riddle "What has two eyes and three feet?" refers to a person who is wearing a pair of eyeglasses (the "two eyes") and using a cane for support (the "three feet"). The two eyes represent the glasses, while the three feet come from the combination of two human feet and the one foot of the cane. It's a playful way to describe a person with a specific accessory.
Two pirates.
three names of foreign and explaination
No, not all elements are abbreviated with one or two letters. Some elements have three-letter abbreviations, such as uranium (U) and tungsten (W), while others have four-letter abbreviations, such as livermorium (Lv) and seaborgium (Sg).
The tuatara, a lizard-like reptile that lives only in New Zealand, has those three 'eyes.'
There are only two elements. They are hydrogen and nitrogen.
Mercury and Pluto (Plutonium)