2.S: Elements, Atoms, and the Periodic Table (Summary) To ensure that you understand the material in this chapter, you should review the meanings of the following bold terms and ask yourself how they relate to the topics in the chapter.2.E: Elements, Atoms, and the Periodic Table (Exercises) These are homework exercises to accompany Chapter 2 of the Ball et al.Some characteristics of the elements are related to their position on the periodic table. 2.7: The Periodic Table The chemical elements are arranged in a chart called the periodic table.2.6: Arrangements of Electrons Electrons are organized into shells and subshells about the nucleus of an atom.2.5: Atomic Masses Atoms have a mass that is based largely on the number of protons and neutrons in their nucleus.Isotopes are atoms of the same element that have different masses. 2.4: Nuclei of Atoms Elements can be identified by their atomic number and mass number.Protons and neutrons are grouped together in the nucleus of an atom, while electrons orbit about the nucleus. 2.3: The Structure of Atoms Atoms are composed of three main subatomic particles: protons, neutrons, and electrons. The modern atomic theory establishes the concepts of atoms and how they compose matter.
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