25
There are 25 protons in an atom of Mn-51 even if the atom has a charge of +1. The proton number also defines the atomic number of an atom.
Explanation:
The proton number of the atoms of an element never change without changing the type of atom/ element. Therefore, in other words, the atomic number (which is equivalent to proton number) remains the same across all isotopes of an element. Even when the atoms lose some electrons, the proton number remains the same.
Manganese (Mn) has atomic number 25. Meaning it has 25 protons. This proton number remains the same even if the Mn atoms are charged.
Learn More:
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PV=nRT
Where:
P= pressure
V= volume
n= mol
R= universal gas constant
T= temperature
To get number of particles : apply the following equation.
n = N/L
Where ;
n =mol
N =number of particles
L =avagadro constant
Answer:
its outermost shell is completely full making it extremely stable.
Explanation:
It only has two electrons in its outer shell so its valence electron configuration is 1s2. Even though it only has two electrons, it is grouped with elements that have eight valence electrons. Helium is still happy because its outermost shell is completely full making it extremely stable.
So they stay together but can open to allow boats through.
Answer:
2-
Step-by-step explanation:
An O atom is neutral because it has the same number of protons as electrons.
O is in Group 16, so it <em>adds two electrons</em> to get a complete octet.
Since it has two extra electrons, the charge on an oxygen ion is 2-.
