Use Le Châtelier's principle to predict how the equilibrium will respond to the indicated changes in conditions. CF 3 COOH ( aq ) + H 2 O ( l ) − ⇀ ↽ − H 3 O + ( aq ) + CF 3 COO − ( aq ) Δ H ∘ rxn ≈ 0 kJ ⋅ mol − 1

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i