A group of atoms bonded together (example: water and glucose) Macromolecules. Matter. Elements and compounds are both examples of pure substances. The same can be said for certain gaseous elements, which may exist in large quantities on Earth but are often intermingled with other elements. In fact hydrogen molecules ([math]H_2[/math]) which would ordinarily have a mass of 2 AMU (i.e. According to Dalton, an element is composed of only one type of atom and a compound is made of particles that are chemical combinations of different types of atoms. In chemistry, a pure substance consists of only one type of atom, molecule, or compound. An element is a pure substance that is made up of only one kind of atom.Elements that can exist as a single atom are the noble gases in Group 18 of the periodic table. A pure substance or chemical substance is a material that has a constant composition (is homogeneous) and has consistent properties throughout the sample. This cannot be separated into any other matter physically. There are four distinct ways of determining the purity of a substance: boiling points, melting points, electrical conductivity, and chemical reactions. A substance that is composed of only one kind of matter is called an element. Compound, chemically. Matter made up of only one type of atom. H2O witch is a compound. When one exposes a pure substance to a specific temperature condition, the environment as well as pressure, they are capable of undergoing definite changes which are unique and recognizable. Because it contain only one atom meemeealade meemeealade Answer: c. Explanation: element only contain one atom. Yes, carbon dioxide is a pure substance not a mixture. For example, aluminum is a lightweight, shiny metal. What is made of two or more kinds of atom and chemically combined? - 4554389 1. What substance is composed of only one kind of atom? The element Carbon is known to help strengthen bones and prevent osteoporosis. It is in the same proportion to the atom as a marble is to a football field. Copyright © 2020 Multiply Media, LLC. Electron. New questions in English. Hydrogen gas and pure iron are examples of pure substances. Hydrogen is a pure substance represented by the chemical symbol H. Which of the following best describes hydrogen? An element is a substance that cannot be broken down into any other substance. - 1434755 An element is homogeneous in nature; it is a pure substance, made up of only one kind of atoms. Others require a deal more effort to refine into a notable volume. Symbols may be used to model the way atoms appear in substances. Changes in temperature or pressure can cause substances to shift between the different phases of matter. All elements are composed of one kind of atom, having a unique number of protons, or atomic number. ocabanga44 found this answer helpful 5.0 (1 vote) Mixing two pure substances results in a mixture. A substance with only one type of atom is called an element. When all atoms that make up a substance are the same, then that substance is an element. compound. The photograph is of Marie Curie (1867-1934). A(n) _____ is a pure substance containing two … An element consist of one type of atom only and all the atoms of an element have the same atomic number (number of protons in nucleus). A molecule always contains different kinds of atoms. Elements are the essential building blocks of the universe, and with the right combination of them, it's possible to create anything. Elements that can exist as a single atom are the noble gases in Group 18 of the periodic table. Chemical substances can be solids, liquids, gases, or plasma. Compounds. Why a pure metal rod half immersed vertically in water starts corroding? Tags: Question 3 . isotope. * MIXTURE: Is a substance in which two or more than two substances combine together in a variable ratio. Why don't libraries smell like bookstores? 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