2“FIND THE "MISSING ELEMENTS" Part I: Paint Chip Periodic TableIn this activity, you will be creating your own incomplete periodic table using paint strips. You will be using "color" as a guide. As you start to arrange your periodic table, you will notice 'holes' or missing colors. Your task will be to arrange your periodic table, so that you will be able to determine the missing elements/colors. You will then determine the missing element's color, shade and location.When you get your materials (1 baggie with 32 color strips):Arrange the color strips by color, left to right, in the order of the rainbow(ROY G BIV).2. Arrange the shades of each color, top to bottom, from light to dark.3. Now you will notice the 'holes' in your periodic table.4. Using colored pencils, sketch or give a name to the colors and locations of the paint strips that are missing colors to form a COMPLETE periodic table.5. Answer the conclusion questions in complete sentences.
4Questions:Explain how you arranged your chips to form a periodic table with rows(periods) and columns (groups).(2) a) Describe the properties of the missing paint chips.b) Ask your teacher for the envelope containing the "missing elements" foryour set. Were you able to predict the properties (color and shade) of thethree elements not yet discovered? Why or why not?(3) Explain the value of your periodic table in predicting properties of paintchips, and explain how chemists used the Periodic Table to predict theexistence of unknown elements.
6H Element Project HYDROGEN The atomic number is one and the atomic mass (weight) is amu. The number of neutrons in the most common isotope is 0 and the number of electrons is one. Hydrogen has three common isotopes. The simplest isotope, called protium, is just ordinary hydrogen. The second, a stable isotope called deuterium, was discovered in The third isotope, tritium, was discovered in It has one electron.Melting Point:13.81 K ( °C or °F)Boiling Point:20.28 K ( °C or °F)Density: grams per cubic centimeterHHydrogen is a colourless, odourless gas that burns and can form an explosive mixture with air. The element, Hydrogen that was discovered by Henry Cavendish. The name was derived from the Greek ‘Hydro genes” meaning water forming. It is found in mines, oils, and gas wells and is manufactured from methane gas and by electrolysis of water aqueous . Hydrogen is used for mental refining, balloons, fertilizers, plastics, salts, and pharmaceuticals. It’s also used for Ammonia, cyclopean, and methanol.Element ProjectHYDROGEN
7Al Hg Si C O2 He NAME 14 15 16 Lithium NAME 8 SYMBOL 9 Calcium 10 11 Hydrogen2Sodium34Nitrogen56Sulfur7Iodine8SYMBOLCO2HeNAME9Calcium1011Neon1213Boron14Chlorine1516LithiumSYMBOLAlHgSi
9In the element key for Carbon, 6 is the atomic number (number of protons)C is the symbol is the atomic mass (average mass of all theisotopes)The isotopes of carbon can have mass numbers of12, 13, or 14 (looking at the atomic mass – whichdo you think occurs most frequently in nature?)Atomic numberAtomic MassProtonsNeutrons ElectronsIsotopes
15Using the Periodic Table Alkali Metals HalogensAlkali Earth Metals Noble GasesTransition metalsLabel the first 18 elements with the chemical symbol, atomic number,and electronic configurationLabel the groups and periodsIdentify the names of the different families/groupsFind a way to distinguish between metals and non-metalsLabel the groups with the number of electrons in the outer energy level
25The number system varies Zig-Zag line separates metals (left) from non-metals (right)From left to right across a period, Most Metallic (Grp 1) to Most Non-Metallic (Grp VII)Hmmm...The number system varies
26Metal Heroes Most nonmetallic – top and right (not group 8) Most metallic - bottom and leftMetal HeroesMost nonmetallic – top and right (not group 8)