A substance made up of an only one kind of an atom is called blank a substance made of two or more different kinds of atoms. Bonded together is called blank.

A substance made up of only one kind of atom is called an element. A substance made up of two or more different kinds of atoms bonded together is called a compound.

A substance made up of only one kind of atom is called an element.

A substance made of two or more different kinds of atoms bonded together is called a compound.

A substance made up of only one kind of atom is called an element. An element is a pure substance that cannot be broken down into simpler substances by chemical means. Each element is represented by a unique symbol, such as H for hydrogen or O for oxygen.

On the other hand, a substance made up of two or more different kinds of atoms bonded together is called a compound. Compounds are formed when atoms of different elements chemically combine in specific ratios. For example, water (H2O) is a compound consisting of two hydrogen atoms bonded to one oxygen atom.

To determine if a substance is an element or a compound, you can use the periodic table of elements and analyze its composition. If the substance is composed of only one type of atom, it is an element. If it is made up of different types of atoms bonded together, it is a compound.