4. Which of the following elements should be the best conductor of electric current? Aluminum
Nitrogen
Helium
Phosphorus

Which best describes how johannes kepler developed his laws of planetary motion

The number to the right of an element's symbol (ex. c-12) identifies the of an isotope.

Which of the following contributes to the structural rigidity of cellulose? adjacent glucose polymers are stabilized by hydrogen bonding. glucose residues are joined by (α1→4) linkages. cellulose is a highly branched molecule. the conformation of the glucose polymer is a coiled structure.