I thought it was pure substance. But i recently took a Science Test of these subject(i'm also in 8th grade) and it was the same question...EXACTLY! I put down Pure substance as well but appearantly the answer was "All of the Above" which included A.Pure Substance B.Compound C.Element ... so as long as you can prove it was only pure substance( This was for extra credit to get points back on the test for my teacher) You got the points. In my opinion a Pure Substance is the substance in which there is only one type of particle. I hoped this helped :)
Element
All elements in the Periodic Table contain only one type of atom.
A radiation particle consisting of two protons and two neutrons is called an Alpha Particle. Alpha Particles have the same structure as a Helium nucleus. There are three forms of radiation, Alpha (Helium nucleus), Beta (a lone electron) and Gamma (an Electromagnetic wave).
a substance
!!A pure substance that cannot be separated or broken down into simpler substances by ordinary chemical means!!
A pure substance has only one kind of particle. Sulfur is an example of a pure substance.
a pure substance
A substance that only contains one kind of atom is called an element.
An element is a substance that contains only one kind of atom, characterized by a specific number of protons in its nucleus. Each element has unique chemical properties based on the number of protons in its atoms.
element
A substance that is composed of only one kind of matter is called an element. The smallest particle of an element is called an atom.
Matter that contains only one type of particle is known as a pure substance. For example, an element like hydrogen consists solely of hydrogen atoms, while a compound like water is made up only of water molecules. In contrast, mixtures contain two or more different types of particles. Thus, pure substances are the only kind of matter that can contain only one type of particle.
a pure substance
A substance that contains only one type of element is referred to as 'intrinsic.' An example being 'Intrinsic Silicon,' used in the production of semi-conductors.
A substance that contains only one type of element is referred to as 'intrinsic.' An example being 'Intrinsic Silicon,' used in the production of semi-conductors.
Aluminum contains only one kind of atom.
A substance that contains only one type of element is referred to as 'intrinsic.' An example being 'Intrinsic Silicon,' used in the production of semi-conductors.