Blueshift if observed when? A. A distant luminous object travels rapidly towards an observer.
B. A distant luminous object travels rapidly away from an observer.
C. A luminous object is stationary compared to an observer.
D. A luminous object travels alongside ti an observer.

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