Question

which of the following is a false statement? lewis dot structures are used to represent valence electrons. it is difficult to determine the valence electrons for transition metals by looking at the group numbers on the periodic table. groups/columns on the periodic table are used to identify the number of valence electrons in main group elements. rows/periods on the periodic table are used to identify the number of valence electrons in atoms. how many valence electrons in fluorine? 1 2 3 4 5 6 7 8

Explanation:

Step1: Analyze first question

Lewis Dot structures represent valence electrons. For main - group elements, group numbers indicate valence electrons. Transition metals are tricky for valence - electron determination from group numbers. Rows/periods don't identify valence electrons; groups do for main - group elements.

Step2: Analyze second question

Fluorine is in group 17 of the periodic table. Elements in group 17 have 7 valence electrons.

Answer:

First question: Rows/periods on the Periodic Table are used to identify the number of valence electrons in atoms.
Second question: 7