Why does the reaction rate decrease as the reaction progresses? O A. The temperature begins to go down.
B. The activation energy goes up.
O C. The rate constant changes over time.
O D. There are fewer reactants left to collide.

Identify one disadvantage to each of the following models of electron configuration: dot structures arrow and line diagrams written electron configurations type in your answer below.

Which of the following electromagnetic waves can create ions?

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided