In a pure substance is a chemical element which contains the base particle and atomic number is the number of protons in the nucleus of the element [1] Examples of the elements carbon, oxygen, such as the familiar aluminum.
The chemical element is a pure substance consisting of elementary particles, atomic number. As the number of protons in the nucleus [1] Examples of elements such as carbon, oxygen, aluminum familiar.
The chemical element is a compound which is composed of elementary particles atomic number. The number of protons in the nucleus of the elements that 1 []. Familiar examples elements such as carbon, oxygen, aluminum.