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The atomic number is equal to the number of protons of that particular element. Sometimes it is displayed as lower-left corner subscript, while the massnumber of an isotope of that element is displayed at the upper-left superscrip.
Example: Uranium(235) is written as 92235Uor 23592U .
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What is the number of atomic mass?
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number)
Atomic weight is equal to the?
Atomic weight/ mass = number of protons + number of neutrons
The atomic mass of Cu-63 is expressed to what number of significant figures?
The atomic mass of Cu-63 should be expressed to two significant figures, which are 63.
What does the atomic mass describe?
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
What comprises the atomic mass?
The atomic mass of an element is the sum of the number of protons and neutrons in the nucleus of an atom. It is approximately equal to the mass number of the atom, which is the total number of protons and neutrons. The atomic mass is typically expressed in atomic mass units (amu).
What do you do with an atomic number and an atomic mass?
The atomic number is the number of a chemical element in the periodic table of Mendeleev; the atomic number is equal to the number of protons and electrons. The atomic mass is the mass of an atom expressed in relative atomic mass units.
What is an elements atomic mass?
it is the total number of protons plus the total number of neutrons expressed in atomic mass units
What is the number of atomic mass?
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number)
Atomic weight is equal to the?
Atomic weight/ mass = number of protons + number of neutrons
The atomic mass of Cu-63 is expressed to what number of significant figures?
The atomic mass of Cu-63 should be expressed to two significant figures, which are 63.
What is the difference of a atomic number and atomic weight?
Atomic number is the number of a chemical element in the periodic table of Mendeleev; it is equal in the neutral state with the number of protons or electrons. Atomic weight is the mass of a chemical element (considering the isotopic composition) expressed in atomic mass units.
What is Barium expressed as an integer?
Barium, a chemical element with the symbol Ba, has an atomic number of 56. This means that, when expressed as an integer, Barium is represented by the number 56.
Is atomic weight and mass number the same?
Mass number: sum of protons and electrons in the nucleus of an isotope. Atomic weight: mass of a chemical element expressed in unified atomic mass units.
What are the relative atomic mass and the atomic number?
Atomic number:- the number of a chemical element in the periodic table of Mendeleev- a number equal to the number of protons in the atomic nucleus- a number equal to the number of electrons in the neutral atomRelative atomic mass: the mass of an isotope expressed in atomic mass units(1 amu= 1/12 atomic mass of the isotope 12C).For chemical elements the term atomic weight is reccomended by IUPAC.
What is a atomic mass for?
the Atomic Mass is how much an element weighs
Why atomic number is expressed by protons and not electrons?
electrons change the charge of an atom, not the element itself.
What does the atomic mass describe?
the mass of an atom of a chemical element expressed in atomic mass units. It is approximately equivalent to the number of protons and neutrons in the atom (the mass number) or to the average number allowing for the relative abundances of different isotopes.
