Most basic elements: Calcium, Magnesium, Barium, Sodium, Potassium, etc.
Polonium doesn't contain another element.
Polonium doesn't contain another element.
no, it is most commonly found as a compound
in an element
Rutherfordium is an artificial element and a single element.
hydrogen is most commonly found as a part of water with oxygen.
Carbon
No, iodine is not a mineral sulfide. Iodine is a chemical element and essential nutrient that is commonly found in seawater and some minerals. Sulfides are a group of minerals that contain sulfur combined with another element or elements, but iodine is not classified as a mineral sulfide.
No, potassium is an element found in the periodic table, and it is commonly found in the Earth's crust and in living organisms. Oxygen is another element found in the periodic table, and it is essential for supporting life through processes like respiration.
Argon is found in the Earth's atmosphere, where it exists as a free element. It is also commonly found in combination with other elements in minerals such as feldspar, micas, and zeolites.
Iron can come in a pure metallic form but it is much more commonly found in non-metallic forms where it is combined with another element to make a compound. The most common are iron and oxygen in the forms of haematite and magnetite.
Sodium