The following is a periodic table below

Question

All the letters are in squares

The S = an empty square

13 Colums in total

Questions:

1. Which pair of eleemtns has the 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 the 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

Answer 1

1. ARe K,F in the same family? Doesn't that make them the same valence?

4. K has the smallest atomic number. Look at a real periodic table.

5. Add three.