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The mass number is the combined number of protons and neutrons in the nucleus of the particular element you are looking at.
NOTE: (don't be confused by the Periodic Table) Different elements have isotopes with varying mass numbers, so the mass number displayed on a periodic table is the ratio of those isotopic mass numbers in any given sample of the element your examining. This ratio is often confused with with the mass number of the element when it is displayed on periodic tables, it is actually the relative Atomic Mass. You can tell if a number is the mass number or a relative atomic mass by whether or not it is a whole number if it is then it's a mass number if it has decimal places out beside it then you're looking at relative atomic mass.
What else can I help you with?
What does periodic mean in science terms?
Usually when saying "periodic," scientists usually refer to the periodic table. This table is the shortened version of gasses, solids, liquids, and so on.
What elements on the Periodic Table make salt?
The answer is Group 17 Halogens.
Is sulfer a element compound or mixture?
Sulfur is an element.Sulfur is an element, represented as S on the periodic table.
What does Hg on the periodic table mean?
Hg is the symbol for MercuryIt comes from the Latin word hydrargyrum no its not its the symbol for hydrogen and it comes from the Irish word hydrargyrum
What does 2Ca in science mean?
It means that 2 is calciums' mass number and atomic number
What does 33 mean in the periodic table?
could be either the atomic number or the mass number of the element, depending on what you are referring to.
What mass is listed in the periodic table?
Atomic weight, which is the mean relative mass and is dimensionless.
What does k mean periodic table?
K on the periodic table is Potassium. It has a mass of 39.0983 amu and its atomic number is 19.K is the symbol for potassium.
Why elements don't have whole numbers?
do you mean the why is the average atomic mass not a whole number? because if that is your question, then the answer is that each element has multipal isotopes and the mass you see on the periodic table is the average of all the isotopes together. So there has to be a decimal on the periodic table of elements
How was mass number arranged in the periodic table?
Strictly, atomic mass is not organised on the periodic table - the periodic table is arranged according to the atomic number (i.e. the number of protons in the nucleus) of the elements.However, as the number of neutrons that are required in the nucleus increases as the number of protons increases, it means that with increasing atomic number you generally get a increase in atomic mass as you go further up the periodic table.BUT, there are exceptions - for complex reasons relating to nuclear stability, the average atomic mass of cobalt (atomic number 27) is actually greater than that of nickel (atomic number 28), and the atomic mass of plutonium (atomic number 94) is greater than that of Americium (atomic number 95).
What does Th mean in the periodic table?
Th is element number 90 on the periodic table It is thorium, it is in the Actinides, and it is radioactive
What does the number on top of the symbol mean in the periodic table?
It is the Atomic Number.
What does Ns mean in the periodic table?
Ns doesn't have a specific meaning in the periodic table. Elements in the periodic table are represented by their chemical symbol, atomic number, and atomic mass. If you're referring to a specific element or compound denoted as "Ns," please provide more context.
What does FN mean on the periodc table and What is it's number?
There is no Fn on the periodic table of elements. However, there is Fm, Fermium, number 100.
What does the period number on periodic table mean?
The group number is an identifier used to describe the column of the standard Periodic Table in which the element appears.
The atomic number of carbon is 6what do you mean by it?
It is number six in the Periodic Table.
What does NO mean on the periodic table?
The only thing it might mean would be number, but that is usually no. and not NO. NO would be nitrogen oxide (nitric oxide), but that would NOT appear in the periodic table, as it is a compound, and only ELEMENTS appear in the periodic table.
