For example, some biologists and chemists work in both fields so much that their work is called biochemistry. Mathematics and Physics are the languages of science, and we will use them to communicate some of the ideas of chemistry.Īlthough we divide science into different fields, there is much overlap among them. Thus, chemistry is the study of matter, biology is the study of living things, and geology is the study of rocks and the earth. Because the physical universe is so vast, there are many different branches of science (Figure 2.1). is the process by which we learn about the natural universe by observing, testing, and then generating models that explain our observations. Science is the process by which we learn about the natural universe by observing, testing, and then generating models that explain our observations. This includes advances in medicine, communication, transportation, building infrastructure, food science and agriculture, and nearly every other technical field that you can imagine.Ĭhemistry is one branch of science. From the color that makes a rose so red to the gasoline that fills our cars and the silicon chips that power our computers and cell phones…Chemistry is everywhere! Understanding how chemical molecules form and interact to create complex structures enables us to harness the power of chemistry and use it, just like a toolbox, to create many of the modern advances that we see today. Section 2.1: Chemistry and Matter What is Chemistry?Įverything around us is made up of chemicals. Image showing periodicity of the chemical elements for standard atomic weights in a 3D periodic table column style.Chapter 2: Atoms and the Periodic Table Section 2.1: Chemistry and Matter What is Chemistry? Physical and Chemical Properties Elements and Compounds Mixtures States of Matter Reactions in Chemistry Section 2.2: How Scientists Study Chemistry The Scientific Method 2.3 Atomic Theory with Historical Perspectives 2.4 Introduction to Elements and the Periodic Table 2.5 Dmitri Mendeleev and the development of the periodic table 2.6 Families of the Periodic Table 2.7 Defining the Atom Basic Atomic Structure – electrons, neutrons, and protons 2.8 Atomic Number – Protons Determine the Identity of an Element 2.9 Atomic Mass, Isotopes, and Molar Mass 2.10 Periodic Table Trends Atomic Size Electronegativity Ionization Energy Metallic and Nonmetallic Character 2.11 Chapter Summary and Homework 2.12 References Image showing periodicity of the chemical elements for standard atomic weights in a 3D spiral periodic table column style. Image showing periodicity of the chemical elements for standard atomic weights in a spiral periodic table heatscape style.

Image showing periodicity of the chemical elements for standard atomic weights in a periodic table heatscape style. Image showing periodicity of the chemical elements for standard atomic weights in a periodic table cityscape style. All other atomic weight values are ratios to the 12C standard value and thus are dimensionless numbers.'

The atomic mass of 12CC is 12 Da, and the atomic weight of 12CC is 12 exactly. 'The atomic mass, m a, of an unbound neutral atom of carbon-12, m a( 12C), in its nuclear and electronic ground states is 12 Da exactly, where Da is the symbol for unified atomic mass unit.

Standard molar mass periodic table