Draw a six-carbon-chain portion from isotactic polypropylene, in which all of the CH3CH3 groups point in the same direction, that is, either all behind or all in front of the plane of the computer screen. XX represents the continuation of the polymer chain. Do not add any bonds to X .

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  

6.4 cm (max) - 25 cm (min)

the answer is c i took the test