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Describe the trends in electron configuration in the periodic table by selecting the terms from the drop-down menus.

The number of valence electrons
from the left to right across a period.
The number of valence electrons
from the top to the bottom of a group.
Electrons are added into the outermost
in Groups 1 and 2.
Electrons are added in the outermost
in Groups 3 through 12.
Electrons are added in the outermost
in Groups 13 through 18.

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saige417
1)Left to right in a period it goes up by one
2) the number valence electrons are the same from top to bottom
mystickarma09
  1. The number of valence electrons increases from the left to right across a period.
  2. The number of valence electrons stays the same from the top to the bottom of a group.
  3. Electrons are added into the outermost s orbital in Groups 1 and 2.
  4. Electrons are added into the outermost d orbital in Groups 3 through 12.
  5. Electrons are added into the outermost p orbital in Groups 13 through 18.
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