Periodic Table Basics Answer Key

University:
Seattle Pacific University
Course:
CHM 1211 | General Chemistry I
Academic year:

2020
Views:

462

Pages:

1
Author:

5prinzg1s

Periodic Table Basics Answer Key 1. Which elements had complete outer shells? Give the name and symbol for each. Helium He Neon Ne Argon Ar What do you notice about the location of these elements? They are all located in the same column at the far right edge of the periodic table. 2. Which elements had only one valence electron? Give the name and symbol for each. Hydrogen H Lithium Li Sodium Na What do you notice about location of these elements? They are all located in the same column at the far left edge of the periodic table. 3. What do you notice about the number of valence electrons as you move from left to right across a row or period in the periodic table? (Na Mg Al Si P S Cl Ar) The number of valence electrons increases by one as you move across the table from left to right. 4. What do you notice about the number of energy levels or shells as you move down a group or column in the periodic table? (H Li Na) The number of energy levels increases by one as you move down the rows. 5. Write the name of each family at the top of the columns on your periodic table using the following information. Alkali Metals - 1 valence electron Alkaline Earth Metals - 2 valence electrons Boron Family - 3 valence electrons Carbon Family - 4 valence electrons Nitrogen Family - 5 valence electrons Oxygen Family - 6 valence electrons Halides - 7 valence electrons Noble Gases - Complete outer shells 6. What do you notice about the location of the elements in each family? The elements in each family are located in same column. 7. In what family would you classify hydrogen? Explain your choice. Alkali Metals – Hydrogen has only one valence electron so it could be classified with the alkali metals. OR Halides – Hydrogen only needs one more valence electron to fill its outer shell so it could be classified with the halides. 8. In what family would each of these elements be classified? Radium – Alkaline Earth Metal Tin – Carbon Family Iodine – Halide Cesium – Alkali Metal 9. Predict the number of valence electrons for each element based on its location in the Periodic Table of Elements. You will need to use the table in your textbook. Barium = 2 Lead = 4 Bismuth = 5 Potassium = 1