What do all decomposition reactions have in common? (my d, correct? )

they all produce water (h2o) as one of the products.

they all produce individual elements as the final products.

they start with more active reactants and end with less active products.

they start with one reactant and end with more than one product.

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