97 3. What electrons do the dots in an Lewis dot structure represent? valenie el
ID: 562293 • Letter: 9
Question
97 3. What electrons do the dots in an Lewis dot structure represent? valenie electrons a) Why are these electrons important? Because thay play a lecaling le in blevels do these electrons fill? ? detoni y ae chemica/ Phpotes of the aba b) What su s and p What are the vertical columns of the periodic table called and what do they describe? They are called fa.iesorgrmp. Nule ,Pike fanalits have similar Propet.es Why do elements in a group exhibit similar chemical properties? 4. 5. 6. Identify the group of elements with the following characteristics: has 3 valence electrons. electron configuration ends in sap electron configuration ends in full s and p orbitals. highly reactive group of metals with one valence electron a. d. have irregular electron configurations.(2 groups) e. this element has unique properties that exclude it from being classified into "one" main group on the table. 7. Which main group element (A" group) has a different number of valence electrons than it's group number? 8. How many valence electrons are in each of the following elements? a. Magnesium b. Arsenic c. Selenium d. Iodine e. Tin 9, What is the highest energy level occupied by each of the following in question #8? a. b. c. d. e.Explanation / Answer
5)
Elements in a group exhibit similar chemical properties becuase they have same valence shell electron configuration.
Example: Halogens ( same group elements) have similar chemical properties becuase the valence shell (outer most) electron configuration of halogens are the same.
Element: Outer most electron configuration
Fluorine(F): 2s22p5
Chloine (Cl): 3s23p5
Bromine (Br): 4s24p5
Iodine (I): 5s25p5
Astatine (At): 6s26p5
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