A Se ion has a mass number of 76 and a charge of − 2 . Determine the number of neutrons, protons, and electrons in this ion.
1 answer:
Answer:
Neutron = 42
Proton = 34
Electron = 36
Explanation:
The atomic number (also known as the proton number) of an element does not change even if the element gain or loss electrons.
With this understanding,
Se has atomic number(proton number) = 34
From question,
Mass number of Se ion = 76
Charge = - 2
Neutron number = Mass number - proton number
Neutron number = 76 - 34 = 42
Since Se ion has a charge of 2-, it means it has gain electrons
Therefore the electron number = 34 + 2 = 36
You might be interested in
Answer:
when water changes from a liquid on earths surface to a gas in the atmosphere,this is known as evaporation
<span>N = +3, H = +1 ,Cl = -1
</span><span>
</span>
Answer:
No because opinion and social values may lead to bias
Explanation:
I'm smart >:)
The oxidation state of Mn2 is 2+