An isotope of potassium with 22 neutrons has an atomic number of 19 and Atomic Mass of 41. The symbol is K with a subscript 19 and superscript 41.
no symbol
This is the isotope plutonium-240: 24094Pu.
You are looking for the symbol of cesium (Cs) and indication of its mass number. The mass number is the sum of the protons and neutrons. So if every atom of cesium has 55 protons, then the mass number of this isotope is 137. The mass number is indicated in superscript before the symbol: 137Cs
1- the name then the nuclear symbol.
The symbol Mn indicates a manganese atom, which always has 25 protons. The electroneutrality required for any atom requires the presence of 25 electrons to balance the electrical charge of the 25 protons. The mass number, 52 in this instances, is the sum of the numbers of protons and neutrons. Therefore, the number of neutrons in the isotope is 52 - 25 or 27.
The number of neutrons in any element depends on the isotope of the element you are referring to. Potassium has 24 isotopes, ranging from 32K to 55K. The most stable natural isotope is 39K, which would have 20 neutrons.
204/80 Hg^2+
no symbol
The chemical symbol for fluorine isotope with 9 neutrons is 18F (18 is a superscript).
18F
This is the isotope plutonium-240: 24094Pu.
The mass number is always the sum of the numbers of protons and neutrons and therefore is 39 in this instance. The atomic number of 19 shows that the atom is of the element potassium, and its symbol is 39K.
This an isotope of osmium, osmium-191. The symbol is 19176Os.
Potassium and it has 19 electrons and protons and 20 neutrons. Potassium and it has 19 electrons and protons and 20 neutrons. Potassium and it has 19 electrons and protons and 20 neutrons.
238U
17P 15
231