60 years is three half life for the substance, so 40*1/2^3=5
An isotope of any element is the same, with a variation in the neutrons of the nucleus.
The mass number change but the atomic number doesn't.
In this case, protium, deuterium, and tritium are all hydrogen isotopes.
Protium is 1H or Hydrogen-1 is without neutrons.
Deuterium is 2H or Hydrogen-2 has one neutron.
Tritium is 3H or Hydrogen-3 has two neutrons.
Answer:
A name used by scientists, especially the taxonomic name of an organism that consists of the genus and species.
Explanation:
Hope this helps
SOS:
The answer is <em><u>gametes!</u></em>
<em>Hope this helps!</em>
