- 2.0: Prelude to Elements, Atoms, and the Periodic Table
- The hardest material in the human body is tooth enamel. It has to be hard so that our teeth can serve us for a lifetime of biting and chewing; however, tough as it is, tooth enamel is susceptible to chemical attack. Acids found in some foods or made by bacteria that feed on food residues on our teeth are capable of dissolving enamel. Unprotected by enamel, a tooth will start to decay, thus developing cavities and other dental problems.
- 2.1: The Elements
- All matter is composed of elements. Chemical elements are represented by a one- or two-letter symbol.
- 2.2: Atomic Theory
- Atoms are the ultimate building blocks of all matter. The modern atomic theory establishes the concepts of atoms and how they compose matter.
- 2.3: The Structure of Atoms
- Atoms are composed of three main subatomic particles: protons, neutrons, and electrons. Protons and neutrons are grouped together in the nucleus of an atom, while electrons orbit about the nucleus.
- 2.4: Nuclei of Atoms
- Elements can be identified by their atomic number and mass number. Isotopes are atoms of the same element that have different masses.
- 2.5: Atomic Masses
- Atoms have a mass that is based largely on the number of protons and neutrons in their nucleus.
- 2.6: Arrangements of Electrons
- Electrons are organized into shells and subshells about the nucleus of an atom.
- 2.7: The Periodic Table
- The chemical elements are arranged in a chart called the periodic table. Some characteristics of the elements are related to their position on the periodic table.
- 2.E: Elements, Atoms, and the Periodic Table (Exercises)
- These are homework exercises to accompany Chapter 2 of the Ball et al. 'The Basics of GOB Chemistry' Textmap.
- 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.
![Elements Elements](https://uploads-ssl.webflow.com/5d2a07e0e06f4c27f29b8e19/5e697d03115d2bd3e48f8fdd_Elements Quiz.jpg)
Caato time tracker 1 1 7. Element Balancing - Element Word Scramble. The following paper-based activities are available: - Element BINGO - Element Word Search. Ui design app. In addition to the information contained within the Periodic Table of Elements, the following articles may be helpful if you are writing a report about an element or if you are making a model of an atom.
Elements 2 3 1 – Periodic Table Of Elements Arranged
- The elements can also be classified into the main-group elements (or representative elements) in the columns labeled 1, 2, and 13–18; the transition metals in the columns labeled 3–12; and inner transition metals in the two rows at the bottom of the table (the top-row elements are called lanthanides and the bottom-row elements are actinides.
- Chemical periodic table of elements with properties of each element.