an introduction to chemistry will be covering various concepts that will set the foundation for the topics later on in the course. In our first lecture classifications and properties of matter who will discuss the three states of matter which both physical and chemical properties in the fundamentals of energy, we'll be talking about thermodynamics, a za concept and in chemistry. It's important to understand how energy is stored and can be transferred between molecules, their work and he in units of measurement. We talk about how the units are important for specifying the physical properties that we measure, and several units will look her often throughout your cash records like crams, moles and so on. Uncertainty in measurement tells us about how certain we are about the physical values that we measure, and significant figures tell us information about uncertainty under the topic, accuracy and precision. We talk about how measured physical values can be accurate or inaccurate and precise or imprecise, and it is important to distinguish these terms because they carry different definitions about death. Dimensional analysis helps us convert units of physical quantities into different units, and it is useful if you have a better conceptual understanding of one unit over the other, like a calorie versus jewels under atomic theory and the nuclear model, The atomic theory helps us understand what matter is made of, and the nuclear model helps us understand the building blocks of Adam under atomic structure and atomic weight. We'll learn what atoms are made up, and it's unique structure. The periodic table is organized in a specific way and helps us understand the shared physical properties of various elements, including reactivity under molecules and arms. We'll learn the different ways that atoms can exist in nature specifically as a combination of atoms or charge species they're getting. Compounds are types of molecules that do not contain carbon atoms, bonds and other elements. And organic compounds are molecules that contain carbon atoms bought into other elements. So we'll be learning the differences between thes two compounds in the following lectures.