What do you call a substance in which all the atoms are alike?

What do you call a substance in which all the atoms are alike?

• A. Compound
• B. Mixture
• C. Element
• D. Solution

Answer: (C)

Having all atoms the same kind means the substance is an element. An element is a pure substance made of only one type of atom, so every particle is that same kind of atom. That’s why pure oxygen gas or gold are elements. A compound contains two or more different kinds of atoms chemically bonded together in a fixed ratio, so its atoms aren’t all identical. A mixture is formed when two or more substances are physically blended; the components can be separated and may include different kinds of atoms. A solution is a type of homogeneous mixture where a substance dissolves in another; it can also contain more than one kind of atom. So a substance with all atoms alike is called an element.

Having all atoms the same kind means the substance is an element. An element is a pure substance made of only one type of atom, so every particle is that same kind of atom. That’s why pure oxygen gas or gold are elements. A compound contains two or more different kinds of atoms chemically bonded together in a fixed ratio, so its atoms aren’t all identical. A mixture is formed when two or more substances are physically blended; the components can be separated and may include different kinds of atoms. A solution is a type of homogeneous mixture where a substance dissolves in another; it can also contain more than one kind of atom. So a substance with all atoms alike is called an element.