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The Simplest Matter
The Elements An element is matter made of only one kind of atom. There are 110 known elements, and 90 of those occur naturally on Earth.
Chemists have created a chart called the Periodic Table of the Elements to help them organize and display the elements.
The Periodic Table The elements are organized on the periodic table by their properties. There are rows and columns that represent relationships between the elements.
The Periodic Table The rows in the table are called periods. The elements in a row have the same number of energy levels.
The Periodic Table The columns are called groups. The elements in each group have similar properties related to their structure.
Atomic Number Chemical Symbol Atomic Mass
In the periodic table, each element is represented by a chemical symbol that contains one to three letters. Chemical Symbol
Atomic Number The atomic number tells you the number of protons in the nucleus of that element.
The atomic mass is the average mass of an atom.
Classification of ElementsElements fall into three general categories – metals, metalloids, and nonmetals. The elements in each category have similar properties.
Metals Metals generally have a shiny or metallic luster and are good conductors of heat and electricity. All metals except mercury, are solid at room temperature.
Nonmetals Nonmetals are elements that are usually dull in appearance. Most are poor conductors of heat and electricity. Also, many are gases at room temperature.
Metalloids Metalloids are elements that have characteristics of metals and nonmetals. All metalloids are solids at room temperature.
The Periodic Table.
Atoms, Elements & The Periodic Table
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Lec: Periodic Table of Elements
Physical Science: Ch 5 Notes
Atomic Structure & Periodic Table. Atoms The smallest part of an element any smaller and it is no longer that element! There is a different atom for each.
Periodic Table of the Elements
The Periodic Table of Elements
The Structure of an Atom
Essential Question: How are the elements organized? THE PERIODIC TABLE.
1-2 The Simplest Matter I. The Elements
Physical and Chemical Properties Vocabulary of Instruction:
Organization o 1860’s scientist realized that by listing the known elements in order of increasing _____________, similar elements with similar ____________appeared.
Atomic Systems Review. __________________ is anything that has mass and takes up space matter.
The Periodic Table. History of the Periodic Table Solving the Periodic Puzzle Created by Dmitri Mendeleev in late 1800s Organized according to increasing.
Conservation of Mass. Antoine Lavoisier First experimental chemist Found that mass of products in a chemical change is always the same as the mass of.
Before you read A or D StatementAfter you read A or D Matter cannot be created or destroyed. The model of the atom has remained mostly unchanged since.
The Periodic Table 10/10/12. The Periodic Table Describing the Periodic Table It arranges all the known elements in an organized chart. Elements are.
Unit 2 – Lesson 5 (The Periodic Table)
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