CHM 101 Sinex Chemical Elements On http://academic.pgcc.edu/~ssinex/chm101.html you will find a set of PowerPoint slides on the Periodic Table of the Elements. Use these to address the following: 1. Name an element that has a biological function in trace quantities: ____ 2. Name an element that has a biological function in large quantities: ____ 3. Name three man-made elements: _____ _____ _____ 4. Name two elements that are gaseous at room conditions: _____ _____ 5. Name an elements that is a liquid at room conditions: _____ 6. Name an elements that has NO stable forms (all radioactive): _____ 7. Name an element that is molecular in its free form: _____ 8. Name an element that is natural but does not occur on Earth: _____ 9. Most elements exist as what state of matter? _____ 10. Does uranium exist in a stable (non-radioactive) form? _____ 11. A gaseous element that has NO stable forms (all radioactive): _____ 12. Name an element in each of the following blocks: s block _____ p block _____ d block _____ f block _____ 13. List the valence electrons for As __________ for Rb ________ 14. Write the formula for an ionic hydride. __________ 15. Name a radioactive natural element found on Earth: ______16. An element that can form an ion with +3 charge and be isoelectronic with a noble gas: _____ 17. Name an element that has similar properties to Sr: ______ 18. Name an element that is extremely toxic: ______ 19. For any element of your choice, go to the WebElements interactive periodic table at http://www.webelements.com and find the following information. Element _____________ Density ______ Melting point ______ Boiling point ______ A reaction of the element and the conditions required. 20. For the elements you selected for questions #1 and #2, using the WebElements, find the biological function of these two