An element is a mixture of two isotopes. One isotope has an atomic mass of 34.969 amu and an abundance of 64.88%. The other isotope has an atomic mass 36.966 amu.
Answer:
matter can either be created nor destroyed but can be transmitted fromone state to another state
i really have no clue
Explanation:
a new scientific discovery that benefits the environment
Answer: we learned this not to long ago i think its a,c
