Stella has poured 3 cups of water into a 1-l soda bottle. stella then sealed the bottle and placed it in the sunlight. what natural process can stella study with the model she built? a. nitrogen cycle b. rock cycle c. carbon cycle d. water cycle

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

Me i dont know what to do! the table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false