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What is the Periodic Table of Elements????? By:Jasmine C. Do you wonder sometimes what the periodic table of elements really is? Where it came from? Or even how it is used in the world today? Well I have all the answers here in my power point. It is filled with all the answers to theses questions and many more!!!!! Other Biggie Science Pages Mrs. Peck’s Physics Homepage What is the Periodic Table Elements???? You ask such intelligent questions my friend! The periodic table is one of the most important tools you will need next year when you take chemistry.It was designed by a Russian chemist in 1869 by the name of Dimitri Mendeleev. The periodic table arranges all the elements in columns and rows in order of increasing atomic number. The columns are known as periods and the rows are known as groups. The design of the periodic table has been revised and other elements have been added since the first periodic table, but is still similar to the first one. Periods • Horizontal in the periodic table. • Some of the properties found in the elements are the same. • The d & f block of the periods are very similar in many ways. Groups • • • • Also referred to as a family. A vertical column in periodic table of elements. The most important way of identifying the elements. In the group the elements in them share the same properties. • Groups that share the same properties happened to not have scientific names, for example: alkaline metals, alkaline earth metals, halogens, and noble gases. Vocabulary associated with the Periodic Table of elements o o o o o o Atoms-The smallest particle of an element that can be identified with the element. Element-A substance made of only one kind of atom. Molecules-Two or more atoms of the same or different elements bonded to form a larger particle. Compound-A chemical substance made of atoms of two or more different elements combined. Chemical Formula-A description that uses numbers and symbols of elements to describe the proportions of elements in a compound or reaction. Nucleus-The positively charged center of an atom.(contains protons and neutrons) o o o o o o o o Neutrons-Nucleons in an electrically neutral state. Protons-A positively charged particle that is one of the two kinds of particles found in the nucleus of an atom. IsotopesAtomic Number-Number of protons in the nucleus of an atom. Ion-An atom with a net electric charge. Periodic Table-A chart that lists elements by atomic number and by electron arrangements. Group-Elements in the same column of the Periodic table. Nucleons-The principal building block of the nucleus; a neutron or a proton Interaction periodic table of elements!!!!! Interact with the Periodic table of elements Basic info on some elements!!!! Sodium • Never found free in nature • Soft, bright, silver, metal • Floats on water • Atomic number 11 • Melting Point 97.8?C Magnesium • Light weighted • Silvery/white • Metal • When burning it has a white flame • Atomic number 12 Iron • Very hard • Used to make steel • The pure metal is very reactive • Atomic number 26 • Melting point 1538?C Lead • Blue/white metal • Extremely soft • Poor conductor of electricity • Used around x-ray machinery to blockade radiation. The uses of the periodic table of elements!!!! People that are familiar with the periodic table of elements can determine: • The atomic mass • The atomic mass to find how many carbon atoms there is in a 1 kilogram block of carbon. • The way certain elements react. • The name of the element if its an Alkali metal, Alkali Earth metal, Nobel gases, Transition metals, Halogens, Rare Earth metals, Synthetic, Gas, liquid, or solids. What do the people really know???? As apart of my project I had to go and ask people, what the periodic table of elements is? This is a graph of the responses that I received. Related links The following sites were used to help me find information for my site and supplied me with some pictures! • Wikipedia (the free encyclopedia) The history The periodic table of elements • Los Alamos National Laboratory's Chemistry Division/ Periodic Table of the elements Uses of the periodic table of elements Info on different elements Pictures of the elements • Western Oregon University The history of the Periodic Table of Elements The history of some elements The history of the modern table • Conceptual Physics, Paul G. Hewitt, City College of San Francisco, San Francisco, California Vocabulary Information on Science Page Other Biggie Questions Mrs.. Peck’s Physics Homepage