Noble gas notation for molybdenum:
[Kr] 4d^5 5s^1
The charge of a Rb ion would be +1
Answer:
Populations have genetic variation.
The environment changes.
Organisms must have specific traits in order to survive and reproduce.
Explanation:
Natural selection provides an advantage during an adverse condition for organisms that have a rich genetic variation in their population.
Also, environmental changes induced natural selection whereby organisms must adapt to changes around them.
For organisms to survive, they must have specific traits that gives them a competitive reproductive advantage.
Atomic mass / mass number / atomic weight
(all of which mean the same thing)
