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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.
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∙ 8y ago
Wiki User
∙ 11y agoThe number of protons and neutrons in the nucleus.
Wiki User
∙ 11y agothe number of protons and neutrons in the nucleus of an atom.
Wiki User
∙ 8y agoThe mass number is the sum of protons and neutrons in the atomic nucleus; is approx. equal to atomic weight.
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∙ 10y agoAdd your answer:
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What is the atomic number of an atom with mass number 9 and 5 electrons?
The atomic number is the number of Protons The mass number is the number of Protons and Neutrons The number of Electrons always equals the number of Protons Therefore according to the above information the atomic number of the atom is 5 HOWEVER there is NO element with a mass number (atomic mass) of 9 with an atomic number of 5. You question is impossible to answer. Beryllium has an Atomic mass of 9.0122 and an Atomic number of 4 Boron has an Atomic mass of 10.811 and an Atomic number of 5
How do you determine the number of protons electrons and neutrons present in an element by identifying its atomic and mass numbers from the periodic table?
Atomic number means number of protons present in an atom. Atomic number= number of protons. mass number = number of neutrons+ number of protons. So if you subtract the number of protons you get neutrons and if you subtract neutrons you get protons. mass number - protons= neutrons Mass number - neutrons = protons.
What information does the percent composition of an atom in a molecule give?
The relative amount of mass an atom contributes to a molecule
Which numbers are added to give the nucleon number of an ion?
No need to add. Use the elemnts mass number, which is the number of protons plus the number of neutrons
What is the atomic number for Ag?
Since a single atom is specified, the mass number of the particular isotope that the atom represents needs to be known. The quotient of the mass number and Avogadro's Number will give the approximate mass of the single atom in grams. (For the most accurate answer, the slight difference in mass between a proton and a neutron and the mass of the electrons in the atom will also need to be considered.)
What is 1 proton 2 neutrons?
<P>proton + neutrons give you a nucleon. the nuceon(or protons +neutron) give you the overall mass of the atom. the mass of electrons is not included, i dont even think that it has mass at all. Hope you're answered?</P>
What information does atomic mass give you?
Atomic mass is the average mass of all isotopes of a given element.
What is the information given by the mass number?
Number or Nuclear Particles
What number does the number of protons plus the number of neutrons give you?
The mass number (similar to the Atomic Mass and not to be confused with atomic number) When the number of protons and neutrons is added the result will be its atomic mass or mass number.
How do you find the mass of an element?
Mass number..can be calculated..by the sum of No. of protons and the No. of electrons. And this would give you the the mass number of the element.
What information is there about Florence Nightingale?
There is a mass of information available and the links below should give you all the information you need.
What does the atomic mass give you the number of?
It gives the number of nucleons = protons + neutrons.
What is future the rapper number?
WikiAnswers does not give out personal information. A number is personal information.
What information is listed in an element's square in the periodic table number of electrons or number of neutrons?
the atomic mass and atomic number (number of protons) the number of neutrons is the mass minus the number
The protons and neutrons in an atom add up to give the atom's?
Mass number/Atomic Mass
What information must be known in order to calculate the mass number if an atom?
The mass number = the number of protons + the number of nuetrons. Each of these particles is considered to have a mass of 1 amu. (atomic mass unit) For example, Aluminum has 13 protons and 14 nuetrons, so it's mass number = 27.
Neymarjr new phone number?
Neymar Jr does not give out his personal phone number to the general public.
