Approximately, yes. But the mass number is an average of the masses of the isotopes of the element, weighted together according to their abundance. This averaging of different whole numbers results in the mass number not being a whole number.
It's because of electrons, they have a relative mass of 1/1836
Because it is an average of the masses of the isotopes of the element, each of which has a different atomic mass (not mess!)
Cadmium is a metal element. Mass number of it is 112.
There are two main reasons. The first is that the masses of protons and neutrons are not 1 unit but slightly greater. The mass of an atom is the mass of a whole number of protons, a whole number of neutrons as well as the same number of electrons as protons. Overall, therefore, the mass should be greater than the number of protons and neutrons (electrons have very little mass). But some of the mass is converted to energy which is used to hold the positively charged nucleus together. As a result the mass of carbon12 is an exact whole number and that is the only element for which that is true.The second, and possibly more relevant reason is that most atoms are found in the form of isotopes which have different numbers of neutrons and so different masses. The atomic mass listed for an element is an average of the masses of all these isotopes, weighted together according to their abundance of earth.
No, it cannot. A whole number is a quantity without units - a pure number. A mass of 1 pound is a whole number of pounds but it is 0.45359 kilograms: not a whole number, or 453.59 grams, again not a whole number.
No.
The atomic number refers to the number of protons in the atom. Since the proton cannot be an in-between number, the atomic number will have to be a whole number. On the other hand, the atomic mass does not have to be a whole number because it is the mass of an atom and is roughly equivalent to the number of protons plus the average number of neutrons in that particular element.
Few elements have isotopes. their atomic mass is not a whole number.
Sulfur- Element Number 16 on the Periodic Table of Elements
The sum of the number of protons and the number of nuetrons.
The mass of an element is determined by the total number of protons and neutrons in its nucleus. This mass is typically measured in atomic mass units (amu) and is an average of all the naturally occurring isotopes of that element.
The average atomic mass of an element is close to a whole number when the element has nearly equal amounts of its isotopes, with atomic masses that are close to whole numbers themselves. This occurs in elements with only one stable isotope or with stable isotopes that have similar abundances.
It's because of electrons, they have a relative mass of 1/1836
Mass number is the average of all the naturally occurring isotopes of that element. When calculated, this average is not a whole number.
It's the electrons that throw it off.
The mass number of an element is the total number of protons and neutrons in its nucleus. To find the mass number on the periodic table, locate the element and round the atomic mass to the nearest whole number, which is the total number of protons and neutrons.
Lead is a metal element. Atomic Mass number of it is 207.