My periodic table project
- 1. Periodic Table By Matthew Ochinero
- 2. What it is... • The Periodic table is a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure appear in vertical columns. • This table includes a total of 118 elements...for now...
- 3. Creator • Dmitri Mendeleev developed the main body of the periodic table around about 1869, since then many scientists have added elements and new discoveries to it. • He became known as “The Father of the Periodic Table”
- 4. How It’s Organized • The Periodic Table is organized in rows and columns.‘Families’ • Reading from left to right, they are arranged in increasing atomic number
- 5. Organization/ Relationships • Mendeleev found he could arrange the 65 elements in the table making them go from a higher atomic weight to a lower. For example, magnesium (atomic weight 24.3) is placed to the right of sodium (atomic weight 23.0) • He also organized similar chemical properties to other elements in the same column - in other words similar chemical reactions.
- 6. More on Relationships... • The periodic table is laid out in rows to illustrate recurring (periodic) trends in the chemical behavior of the elements as their atomic number increases: a new row is begun when chemical behavior begins to repeat • This means that elements with similar behavior fall into the same vertical columns.
- 7. Elements... • Chromium Symbol:Cr Atomic number:24 Atomic Mass: 51.9961 Was used to coat metal weapons at one point. Density:7.19 g·cm−3 • Boron Symbol:B Atomic number:5 Atomic Mass:10.811 Used as a dopant in the semiconductor industry. Liquid density at m.p.: 2.08 g·cm−3
- 8. Elements Continued... • Iridium Symbol:Ir Atomic Number:77 Atomic mass:192.217 • Density (near r.t.): 22.56 g·cm−3
- 9. Works Cited • http://www.chemicool.com/ • http://www.ptable.com/ • http://www.wikipedia.com/