I have attached the answer. hopefully, i read the problems correctly. let me know if I did not.
both problems are an example of beta decays. when an atoms' atomic number is increased by one. this is symbolized with -1 e
A model is a purposeful representation of reality. When law is more complex and dynamic. Law is the description of an observed phenomenon. Make sense?
Hopefully that helped :)
Answer: The correct option is:
Explanation:
In balanced chemical equation , mass of the reactants is always equal to the mass of the products.
This is the balanced equation because on both sides number of sodium and bromine atoms are same.
On the reactant side there are two sodium atoms and two bromine atoms
On the product side there are also two sodium atoms and two bromine atoms in NaBr.
Mass of reactants (here 2Na and 
)= Mass of products(here 2NaBr)
2(23u) + 2(79.9u) = 2(23u + 79.9u) = 205 u
Answer:
B
Explanation:
they actually say the same thing they differ with smaller things
Answer:
to measure seismic waves
Explanation:
it's used during earthquakes to tell how big on the richter scale the earthquake was
