It is an atom of the element manganese (symbol - Mn).
What do you mean? Atomic mass of an atom is the weighted average mass of all the naturally occurring isotopes of that element, measured in amu (=atomic mass unit). I do not know how do you want to call it, it is just atomic mass, average atomic mass, mass of an atom, atom's mass...
The mass number of an atom is the number of protons plus the number of neutrons in its nucleus. So an atom with 15 protons and 10 neutrons would have a mass number of 15 + 10 = 25.
One can ignore the scant contribution of electrons to atomic mass. Simply add the number of protons and neutrons to obtain 53. Please see the link.
An element's core properties are determined by the number of protons. 21 protons makes this element Scandium. The number of neutrons that Scandium has is 23 in its normal state. It makes this an isotope of Scandium.
47 (and it's ionized)
12
What do you mean? Atomic mass of an atom is the weighted average mass of all the naturally occurring isotopes of that element, measured in amu (=atomic mass unit). I do not know how do you want to call it, it is just atomic mass, average atomic mass, mass of an atom, atom's mass...
The mass number of an atom is the number of protons plus the number of neutrons in its nucleus. So an atom with 15 protons and 10 neutrons would have a mass number of 15 + 10 = 25.
Knowing the nuclear charge of an element is important as it will tell you what kind of reactions you can expect. The element with the nuclear charge of 25 is manganese.
The element with atomic number 25 is manganese. It has known isotopes with mass numbers including every integer from 49 to 60 inclusive, along with 62. However, the only one that is naturally occurring is the one with mass number 55.
13 electrons, because the atomic number is 13.
41 = 25 + 16, the latter being the atomic number of sulfur.
One can ignore the scant contribution of electrons to atomic mass. Simply add the number of protons and neutrons to obtain 53. Please see the link.
Atomic number 20 therefore 20 protons and 20 electrons. Mass number 45 therefore 45-20 = 25 neutrons.
The isotope 56Mn has 25 protons, 25 electrons, 31 neutrons and a mass number of 56.
That's Manganese and it has (about) 30 neutrons - - - - BUT your question would have an answer of 11.
That's Manganese and it has (about) 30 neutrons - - - - BUT your question would have an answer of 11.