what is the element's atomic mass number?
473896
A property closely related to an atom's mass number is its atomic mass. The atomic mass of a single atom is simply its total mass and is typically expressed in atomic mass units or amu. By definition, an atom of carbon with six neutrons, carbon-12, has an atomic mass of 12 amu.
730568
Atomic number. The number of protons in an atom of an element is its atomic number . Remember that: all atoms of a given element have the same number of protons.
778557
Each atom also has a mass number, denoted by the symbol A. The mass number of an atom is equal to the number of protons plus the number of neutrons that it contains. In other words, the number of neutrons in any atom is its mass number minus its atomic number.
612800
Atomic number and mass number The total number of protons and neutrons in an atom is called its mass number.
436750
Atomic mass is associated with the number of neutrons and protons that are present in a particular nucleus of an element. Atomic number is usually the number of protons present in an element's nucleus. ... Isotopes only share the same atomic number.
1035667
Atomic number is equal to the number of protons and number of electrons in the nucleus . Mass no is equal to the sum of the number of protons and neutrons in the nucleus of an atom.
786050
The mass number (symbol A, from the German word Atomgewicht [atomic weight]), also called atomic mass number or nucleon number, is the total number of protons and neutrons (together known as nucleons) in an atomic nucleus.
1089463
Mass number is the number of protons + neutrons in one particular atom. Atomic mass is the weighted average of all naturally occurring isotopes of the atom.
463475
The atomic number (Z) of an element is equal to the number of protons in its nucleus. The mass number (A) of an element is equal to the sum of the protons and the neutrons in its nucleus. Isotopes are atoms of the same element that have a different mass number (A) but the same atomic number (Z).
241342
The total number of protons and neutrons in an atom is called its mass number. The proton number is shown below the chemical symbol, and the mass number is shown above. In this example the atomic number is 17 and the mass number is 35.
1417560
The atoms of different elements all have different numbers of protons. Meanwhile, the mass number of an atom consists of the total number of protons and neutrons it contains. An atom's mass number can never be smaller than its atomic number, and while it can be the same it is normally larger.
321051
The atomic number of the element equals the number of protons. Calculating the number of neutrons then becomes atomic mass of the isotope minus the atomic number of the element equals the number of neutrons.
451311
Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers. Atomic number, chemical symbol, and mass numberCarbon has an atomic number of six, and two stable isotopes with mass numbers of twelve and thirteen, respectively.
461856
Mass number We know that the atomic number of sodium is 11. This tells us that sodium has 11 protons and because it is neutral it has 11 electrons. The mass number of an element tells us the number of protons AND neutrons in an atom (the two particles that have a measurable mass). Sodium has a mass number of 23amu.
484693
The average atomic mass of an element is the sum of the masses of its isotopes, each multiplied by its natural abundance (the decimal associated with percent of atoms of that element that are of a given isotope). Average atomic mass = f1M1 + f2M2 +…
546237
Mass number and atomic number The number of protons is what defines the element , ie an atom with six protons in its nucleus will always be carbon, and uranium will always have 92 protons. The total number of protons and neutrons is called the mass number and the number of protons is called the atomic number .
231348
The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).