Question

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.

Answer 1

1)Left to right in a period it goes up by one
2) the number valence electrons are the same from top to bottom

Answer 2

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.