Chemistry help?

Question

1) On going from left to right in a periodic valence of elements?..... ......2) on going down in a group, chemical reactivity of metals?...... .......3)On going down in a group of non-metal chemical reactivity of elements?............. 4)Modern periodic table was presented by?............... for q's 1-3 just say increase or decrease or remain the same........... for q #4 choose from Mendeleev Rutherford Moseley Bohr

Answer 1

1. As you go across, first the valence will increase with positive numbers. The mid point is +/- 4. Then is becomes -3, down to zero.

2. Increases

3. Decreases

4. All of the answers are wrong. The real presenter of the "modern" periodic table is Glen Seaborg

The first one to establish a periodic table was Mendeleev