Answer:
18 years old or when they become mature.
Explanation:
True. An element's properties are based on their atomic numbers, atomic masses and electron configurations.
Hope it helped!
The answer is <span>D.when the aim is to show electron distributions in shells. This is because there are some instances when elements don't possess a regular or normal electron configuration. There are those who have special electron configurations wherein a lower subshell isn't completely filled before occupying a higher subshell. It is best to visualize such cases using the orbital notation.</span>
An organism that breathes with its lungs, lays eggs and has feathers is a bird!
