-4
Explanation:
If a radioactive isotope undergoes alpha decay, it's mass number will change by -4.
The mass number of a nuclei is the sum of its number of protons and neutrons.
An alpha particle is similar of a helium atom:
⁴₂He
The atom above is made up of:
mass number = 4
Atomic number = 2
Number of protons = 2
Number of neutrons = 2
Number of electrons = 2
If a substance is undergoing radioactive decay, the mass number of the product will decrease by 4 and the atomic number will decrease by 2.
In nuclear equations, mass and atomic numbers are usually conserved.
learn more:
Transmutation brainly.com/question/3433940
#learnwithBrainly
If a cell has a nucleus then it's eukaryotic
Because its members are so different from one another. Protists include microscopic organisms that are not bacterias, not animals, not plants and not fungis
Answer:
One of the easiest things people can do when water is scarce is limit its use. for example take shorter showers, water your lawns less
Explanation:
Explanation:
There are 4 main blood groups (types of blood) – A, B, AB and O. Your blood group is determined by the genes you inherit from your parents. Each group can be either RhD positive or RhD negative, which means in total there are 8 blood groups.