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
All atoms of chemical elements contain protons, neutrons (excepting the isotope H-1)and electrons. The natural isotopes of bromine are 79Br and 81Br. For the list of all isotopes see the link below.
Sodium atoms always have 11 protons. Since the mass number is the sum of protons and neutrons, one can find the number of neutrons by subtracting the number of protons from this number. Thus, sodium 25 has 14 neutrons.
The most common isotope of a sulphur atom has 16 electrons, 16 protons, and 16 neutrons.
An isotope of Carbon (C-13).This C-13 isotope has a natural abundance of 1.1%. That means that 1.1% of all the Carbon atoms have this configuration.The most abundantly found isotope (C-12) has 6 protons, 6 neutrons and 6 electrons. 98.9% of all the Carbon atoms have this configuration.
Copper has 29 electrons and protons; the number of neutrons is specific for each isotope. Number of neutrons in a copper isotope = Mass number - 29
Cesium (caesium) has the atomic number 55 (55 protons).Virtually all naturally occurring cesium has 78 neutrons (Ce-133).Trace and synthetic isotopes of cesium can have 79, 80, or 82 neutrons.(134Ce, 135Ce, 137Ce)
It depends on the isotope.
In atomic form (as opposed to being an ion), cesium-137 has 55 electrons, just as all cesium atoms have.
isotope
Most carbon atoms have 6 neutrons, but a small fraction of them have 7 neutrons (to make carbon-13 isotope atoms) or 8 neutrons to make carbon-14 isotopes. Radioactive carbon atoms with other numbers of neutrons can be made in nuclear reactions.
An isotope is any of the atoms of an element with different numbers of neutrons. It is determined by using the atomic weight,which is determined by the number of neutrons.
The isotope carbon-12 has 6 neutrons; the isotope carbon-14 has 8 neutrons.
Atoms of the same element that differ in number of neutrons
Any atom with an atomic number of 10 is indeed neon. Most such atoms may have only 10 neutrons, but those with 12 neutrons are another isotope of neon. Since the mass number of an isotope is the sum of the numbers of protons and neutrons, the mass number of this isotope is 22, and one way of writing its symbol is 22Ne.
To write an isotope you will write the mass number in the upper left-hand corner, then under it you will write the number of protons, then next to this you will write the symbol for the element.So...for the isotope of platinum that contains 118 neutrons:Protons (from the periodic table of elements) = 78Mass Number = neutrons (118) + protons (78) = 196Element symbol = PtAnd it will look something like this:196 Pt78
Isotopes are atoms of a particular element with different numbers of neutrons. A radio isotope is an isotope that is radioactive because the nucleus is unstable.
The number of neutrons is different for each isotope.