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Announcements:

Announcements:. We will meet in the computer lab, Room 301, tomorrow, the 17 th. Academic Content Standards. PHYSICAL SCIENCES

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Announcements:

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  1. Announcements: We will meet in the computer lab, Room 301, tomorrow, the 17th.

  2. Academic Content Standards PHYSICAL SCIENCES • Benchmark A: Describe that matter is made of minute particles called atoms and atoms are comprised of even smaller components. Explain the structure and properties of atoms.

  3. What is an atom? • The smallest particles of matter are called atoms. Neutrons have no charge Protons have a positive charge Electrons have a negative charge

  4. Atomic Charges • If an atom loses an electron, it becomes positive. • If an atom gains an electron, it becomes negative. • Positive and negative charged atoms are called ions.

  5. The Periodic Table of Elements • All the different types of atoms are called elements and are organized onto the periodic table. • Each element has a different number of protons/electrons. • All atoms of the same type of element contain the same number of protons. This is called the atomic number. • The atomic mass is shown at the bottom of the element; it is a combination of the weight of protons and neutrons in that element

  6. The Periodic Table of Elements • The same type of element will always have the same number of protons, but that element can differ in the number of neutrons. This is called an isotope; each isotope of an element has a different atomic mass Example: Carbon-12 Carbon-14

  7. The Periodic Table of Elements • Periodic Table is organized to relate similar properties together • Horizontal rows are called periods and indicate how many energy levels (shells) the elements have (e.g. Elements in period two have two energy shells to fill) • Vertical columns are called groups or families and show how many electrons are in the outermost energy shell • The table is usually color-coded to show what physical state the elements are in

  8. Bohr Model of An Atom

  9. References • http://www.google.com/imgres?imgurl=http://www.vtaide.com/png/images/atom.jpg&imgrefurl=http://www.vtaide.com/png/atom.htm&h=444&w=443&sz=96&tbnid=7IfbyagU8DpuYM:&tbnh=127&tbnw=127&prev=/images%3Fq%3Datom&usg=__dO_Eep0bu4MAGXfRT6kaLXvAulw=&ei=fnm2Sp66HqiI8Abt4IHEDQ&sa=X&oi=image_result&resnum=6&ct=image • http://img.brothersoft.com/screenshots/softimage/p/periodic_table-196985-1228791898.jpeg • http://www.corrosionsource.com/handbook/periodic/periodic_table.gif • http://physics.gmu.edu/~rms/astro113/images/L3/l03X44.GIF

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