Answer:
B. IT should have a very broad focus with many variables.
Frequency refers to the number of wavelengths that pass a fixed point in a minute. true or false
Answer:True
An unstable isotope changes until it reaches a different element that is stable.
An unstable isotope changes until it reaches a different isotope of the same element that is stable.
i just did this on ed the other answer was wrong. these ones are right tho