A person goes to see a fireworks show and is in awe of the bright purple and red colors in the sky. Which metal ions produced this spectacle?
Sodium and copper

Which sentence best describes the formation of igneous rock? a- lava on the surface dries up and makes arock b_melted rocks cools and forms crystals c_rocks under tremendous heat and pressure d_magma is melted rock underground

For ai it's atomic number is 13 and it's mass number is 27 how many neutrons does it have

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.