The modern periodic table Elements are arranged according to atomic number Periods = horizontal rows of elements Group (family) = vertical column of elements with similar properties Zig zag line = separates metals from nonmetals Mg Br Cl C H Fe Ca P Zn
Why the periodic table works? It works because it's based on the structure of the atoms, especially the valence electrons. All the elements in a family all have the same number of valence electrons. http://www.echalk.co.uk/Science/chemistry/periodicTableGame/periodicTable.html
Across the top are numbers 1-18. These numbers help to identify the group number. They help to determine the Valence electrons. The Periodic Table is a map to help explain elements and their characteristics. Along the side are numbers 1-7. These numbers are known as period numbers. They help to determine the number of shells for electrons around the nucleus. The elements on the periodic table are the average of that type ofelement. The most common form.
Periodic Cell Block: What can you find out? Identify the information in the periodic cell block, drag up the words to complete the columns. Helps to identify ..... What is it? Magnesium name 12 number protons atomic number Mg symbol number of protons + neutrons 24.305 atomic mass Name of the element plus the atomic mass value: Mg 24 or Magnesium 24
Uranium Protons: Neutrons: Electrons: Name of element: 92 U 239.029 Uranium for nuclear energy provides about 4% of the world's non-renewable energy. Majority of the world supply of Uranium is mined in Australia and exported to other countries.
ELEMENTS IN A COMPOUND A compound is formed by combining 2 or more elements. Think about this...the compound words such as butterfly, doghouse, and clockwise are formed by adding together 2 smaller words. They are very different from butter and fly, dog and house, and clock and wise!
MOLECULES = + H O H O H HYDROGEN + OXYGEN = WATER MOLECULES ARE THE SMALLEST UNIT OF A COMPOUND. (Remember a compound is formed by combing 2 or more elements.)