Warm Up: Lewis Dot Diagrams

What do Lewis Dot Structures primarily represent?

• The total number of electrons in an atom

• The number of protons in an atom

• The valence electrons of elements

• The atomic mass of an element

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In a Lewis Dot Structure, what do the dots surrounding the chemical symbol represent?

• Protons in the nucleus

• Neutrons in the nucleus

• Electrons in the inner shells

• Valence electrons in the outer shell

How many valence electrons does an element from Group 1 of the periodic table have?

• 0

• 1

• 2

• 3

For elements in Groups 13 through 18 (excluding Helium), how can you determine the number of valence electrons?

• Subtract 10 from the group number

• Add 10 to the group number

• The group number directly indicates the valence electrons

• Multiply the group number by 2