Look through the slides below at the difference between naming ionic and covalent compounds, and then write the names of the following covalent compounds. • S03 • N2S • PH3 BF3 P2Br4 As

Chemical energy is a form of a. kinetic energy only. b. both potential and kinetic energy. c. neither potential nor kinetic energy. d. potential energy only. reset

Chromosome 17 is made of over million base pairs.

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.