CHM 1020 Chapter Three (Sample) Name:___Answers_____

Chapter Three (M-3) Part P: Periodic Chart Identification 15 points

Selected symbols have been placed into the following blank periodic table of elements:

Which symbol in the above periodic table fits the following description?

__K___1. an alkali metal

__F___2. A halogen

__Sr___3. an alkaline earth element (also Be)

__Ar___4. a noble gas

__Sn___5. A representative element in the fifth period

__As___6. a semimetal

__Pm___7. An element in the lanthanide series

__Al___8. an element with the atomic number 13

__Hg___9. an element filling a 5d sublevel

__Se___10. an element with six valence electrons

__Co___11. an element corresponding to: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁷

__Sn___12. an element with four valence electrons

__Pu___13. an element in the actinide series

__H___14. the main isotope of this element has zero neutrons in the nucleus

__H___15. a representative element in the first period of the periodic table