The answer is B. Hope this helps you!
-Belle
Answer:
A mixture
Explanation:
The elements of a mixture combine physically, yet there is no chemical reaction
Isotopes
Atoms of the same element; number of protons remain the same, number of neutrons vary. Chemical properties remain the same. Atomic mass varies.
Na sodium with 11 neutrons = atomic mass of 22
With 22 neutrons the mass is 23.
Both have 11 protons in the nucleus.
The correct answer to the question Which of the following was an early realization that gave rise to Darwin's theory of natural selection? is D The earth and its organisms have changed through time.
You will be able to recover from exercise when you are fit because your body can be more quick and agile and development more to the best of it's abilities it will be stronger and more effective to complete any activities . your body can use it's energy for more important matters instead of it turning into waste . because there will be nothing to hold your body back from using it's full potential.