The average atomic mass of fictitious element z is 261. 4 amu. Z has only 2 isotopes. One of its isotopes has an atomic mass of 260. 0 amu the other 264. 0 amu. Choose the abundance for the isotopes.

These three organisms are interdependent on each other for their survival. what will happen if foxes are eliminated from the region? a. there will be more rabbits and less grass in the region. b. there will be more grass and fewer rabbits in the region. c. there will be fewer rabbits and less grass in the region. d. there will be more rabbits and more grass in the region.

What is the binomial name of the horsefly species that's golden backside inspired a 24-year old researcher to name it after a pop star in january 2012?

How are brightness and size related when it comes to stars