will give one example of metals that are already experiencing a price bubble and from there I will show that the iron ore industry has a VERY similar industry dynamics Here is the example: Do you remember the last two rows on the bottom of the periodic table. Those elements are named rare earth metals The rare metals industry 1. Is concentrated: 80% of World’s supply of Rare earth metals used to come from a single mine in China 2. Has supply constraints: In last December‚ the Chinese government
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protons 12 - An object had a mass of 14.23 g when weighed on a balance. The uncertain digit in the measurement is: 1 4 2 3 13 - The smallest volume is represented by: 1.0 L 20.0 mL 4.0 × 10-2 L 1.0 × 104 cm3 14 - In the Periodic Table‚ the inert gases are in the same Sector Period Group None of the above 15 - The final answer for the calculation‚ (4.15 × 10-5) × (1.1 × 105)
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Chemistry 12 Thought lab Part 1 (Procedure) 1) 1s22s22p23s23p24s23d24p25s24d25p26s24f25d26p2 2) When ml can only equal 1‚ each energy level can have only 1 orientation so according to the exclusion principle only 2 electrons with opposite spins can be in each orbital. So in order to get to element 30 you would need to go all the way to the 6p orbitals. In other words‚ every two electrons would necessitate going to a new orbital. 1 | 1s1 | 11 | 1s2 2s2 2p2 3s2 3p2 4s1 | 21 | 1s2 2s2 2p2 3s2 3p2
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disulfide. Sulfur is very reactive; it reacts with all metals except gold and platnium‚ forming sulfides. It also forms compounds with various non-metallic elements. Sulfur forms over 30 solid allotropes. Sulfur is a chalogen (group 16 of the periodic table) and a non metal. Sulfur’s atomic weight is 32.06. It has 16 electrons‚ protons and it’s neutrons in it’s isotope is 16. It has a melting point of 115.2*C‚ and a boiling point of 444.7*C. Name: The name Sulfur is derived either from the Sanskrit
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Tutorial 1: Atomic Structure and Bonding in Solids 1. (a) Cite the difference between atomic mass and atomic weight. (b) Silicon has three naturally-occurring isotopes as shown in the table below. On the basis of this data‚ confirm that the average atomic weight of Si is 28.0854 amu. |Silicon Isotope |Natural Abundance |Atomic mass of | | | |isotope (amu) | |28Si |92.23 % |27.9769 | |29Si
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filling in the proper bubble with a #2 pencil. If you change an answer‚ erase the undesired mark thoroughly. Be sure to fill in the boxes for your student number‚ name and lab section; then correctly fill in the corresponding bubbles beneath them. A periodic table and other useful information are attached to the back of the exam. There are 4 exam pages and 26 questions. Check to be sure you have answered them all! 1. (zero points) Which version of the exam do you have? (a) A (b) B 2. (5 points) Which
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Ghiladi - Exam 1 Name: ______________‚ ______________ ID #:______________ (last) (first) Directions: 1. WRITE AND BUBBLE in LAST NAME‚ FIRST NAME and ID# on the Scantron sheet 2. Enter exam code 111 in the ‘Special Codes’ section of the Scantron sheet 3. Write your name and ID# on this exam paper 4. Hand in all materials before leaving the classroom 5. FAILURE TO FOLLOW DIRECTIONS WILL RESULT IN A ZERO h = 6.6262 x 10-34 J•s c = 3.00 x 108 m/s RH = 3.290 x 1015 s-1 Bohr radius
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TO CANDIDATES • Do not open this examination paper until instructed to do so. • Answer all the questions. • For each question‚ choose the answer you consider to be the best and indicate your choice on the answer sheet provided. • The periodic table is provided for reference on page 2 of this examination paper. • The maximum mark for this examination paper is [30 marks]. 8812-6104 12 pages © International Baccalaureate Organization 2012 8812-6104 21 Sc 44.96 20 Ca 40
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Negligible (too small to count) What is the mass of an electron? 1 AMU or g What is the mass of a neutron? Increasing atomic number Elements on the periodic table are arranged in order of … # of electrons = # of protons What is the relationship between protons and electrons? 2 How many electrons can the first orbital or shell hold? 8 How many electrons can the second orbital or shell hold? 9/15
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BTEC Chemistry – Titration experiment I – Standard Solution Prep Preparation of a standard solution of sodium carbonate Anhydrous sodium carbonate is a suitable chemical (primary standard) for the preparation of a standard solution. Standard Solutions are critical in chemistry because you need to have solutions with an EXACT known concentration and volume. Chemicals/Materials: solid sodium carbonate (Na2CO3) distilled water Apparatus: 250cm3 volumetric flask 250cm3 beaker Glass
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