Posted by **liz** on Sunday, November 4, 2007 at 9:40am.

The following is a periodic table below

All the letters are in squares

The S = an empty square

13 Colums in total

Questions:

1. Which pair of eleemtns has hte same number of valence electrons? clueless

2. What pair of elements is in the same period? D and R

3. Which pair of elemetns is in hte same family? K and F

4. Which element has the smallest atomic number??

5. IF the atomic number of element D is 20 then wha tis the atomic number of R? HELP CLUELESS

K S

S S S S J S S

F S S S S S S

S S S D S S R S S S S S S

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