It’s should be the second one
Answer:
Time is something I constantly run out of-
Answer:
p = 43, n = 57, e = 40
Explanation:
Z is the number of protons. The number of neutrons, subtract Z from the isotope number (100). To begin with, protons and electrons are equal in an atom, but this atom lost three, so subtract 3 from Z.
Z= # of protons = 43
100 - 43 = 57 neutrons
43 - 3 = 40 electrons.
25 years! Note that it takes 25 years for half of strontium 90 to decay.
Each cell does not perform every life function on its own. Instead, the cells work together to carry out the life functions of the organism.
