Manganese(II) complexes, such as [Mn(H2O)6]2 , are often high spin. How many unpaired electrons are there in such complexes

This active feature of earth's crust in building mountain ranges as well as islands. this feature is a a) cavern. b) earthquake. c) mountain. d) volcano.

The same side of the moon always faces earth because the

What is a substance? a. a physical property of matter b. a chemical property of matter c. an element or compound that cannot be physically separated d. characteristics used to tell the difference between mixtures