![]() ![]() ![]() When an atom is smaller, its outer electron is closer to its positive nucleus, which means it takes more energy to remove it. In the fourth period of the periodic table, the general trend of reactivity decreases, but why is that? An atom is reactive when it is easy to remove electrons for a chemical reaction. Because of this, electrical circuits and devices may become hot after prolonged use.įigure 2: Electrons traveling through a wire made of a conductor and an insulator. Collisions between atoms and electrons disrupt the current and release some of the energy as heat. ![]() Examples are metals and graphite, which have free electrons that are free to flow in the material, while non-conductive materials offer resistance to electrons flowing. Conductive materials allow current flow (low resistance/resistance). The ability of a substance to change depends on the chemical composition of the substance.Ĭonductivity is a physical property of a material that describes how resistant the material is to the flow of electric current. Chemical properties are the ability or inability of a substance to combine or change into other substances. Properties of matter: Physical properties are properties of a substance that can be observed or measured without changing the substance's chemical composition. Not being able to visualize the process and not seeing its relevance in the real world can undermine learning and prevent students from staying motivated. The physical and chemical properties of matter occur at the subatomic level, you cannot see it. There are three reasons in particular why properties of matter can be difficult, even for the most diligent of students 1. Read on to find out why this can be a difficult topic for teachers and students, suggestions for handling the situation, and ideas for why virtual labs can make things easier. ![]() Substances can be further characterized by their composition as elements, molecules, or compounds.įigure 1: A, B, and C are all substances. The properties of matter can be divided into two groups, namely physical properties and chemical properties. Protons, neutrons, and electrons are common examples of matter. This means that matter must have both volume and mass. Matter is a substance made up of different types of particles that occupy physical space and have momentum. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |