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Why can an atom have the same number of neutrons and still be an isotope?
an isotope is defined by an atom with the same number of protons, but a different number of neutrons
What is the defined atomic mass in amu of this isotope?
The atomic mass of an isotope is the weighted average mass of all the isotopes of that element based on their natural abundance. It is expressed in atomic mass units (amu).
What is the atomic number for the following isotope the calcium isotope with 22 neutrons.?
The atomic number of an element is defined by the number of protons in its nucleus. For calcium, which has the symbol Ca, the atomic number is 20, meaning it has 20 protons. The isotope of calcium with 22 neutrons would be calcium-42 (20 protons + 22 neutrons = 42). Therefore, the atomic number for this calcium isotope is 20.
How many neutrons and protons does neutral atom of sodium with an atomic mass number of 23 have?
Every sodium atom has 11 protons, the atomic number of sodium. The isotope with mass number 23 has (23 - 11) or 12 neutrons, because the mass number of an isotope is defined as the sum of the numbers of protons and neutrons in the isotope.
What is the atomic mass of an element and how is it determined?
The atomic mass of a radioactively stable element is defined as the mass, usually measured in grams, of Avogadro's Number of atoms of the element as obtained from natural sources on Earth. For most elements, this atomic mass will be an average, weighted by natural isotope percentages, of the individual isotopes of the atom that naturally occur, but some elements have only one naturally occurring non radioactive isotope. The scale of atomic masses is now established by defining the mass of a carbon-12 isotope to be exactly 12. The atomic masses of other elements are defined by their mass ratios to a carbon-12 isotope.
Why can an atom have the same number of neutrons and still be an isotope?
an isotope is defined by an atom with the same number of protons, but a different number of neutrons
What is the basic of time?
The second, defined as the time taken for a specific number of vibrations in a particular isotope of caesium.
What is the basic unit of time is?
The second, defined as the time taken for a specific number of vibrations in a particular isotope of caesium.
What is the defined atomic mass in amu of this isotope?
The atomic mass of an isotope is the weighted average mass of all the isotopes of that element based on their natural abundance. It is expressed in atomic mass units (amu).
What is the atomic number for the following isotope the calcium isotope with 22 neutrons.?
The atomic number of an element is defined by the number of protons in its nucleus. For calcium, which has the symbol Ca, the atomic number is 20, meaning it has 20 protons. The isotope of calcium with 22 neutrons would be calcium-42 (20 protons + 22 neutrons = 42). Therefore, the atomic number for this calcium isotope is 20.
How many neutrons and protons does neutral atom of sodium with an atomic mass number of 23 have?
Every sodium atom has 11 protons, the atomic number of sodium. The isotope with mass number 23 has (23 - 11) or 12 neutrons, because the mass number of an isotope is defined as the sum of the numbers of protons and neutrons in the isotope.
What is the atomic mass of an element and how is it determined?
The atomic mass of a radioactively stable element is defined as the mass, usually measured in grams, of Avogadro's Number of atoms of the element as obtained from natural sources on Earth. For most elements, this atomic mass will be an average, weighted by natural isotope percentages, of the individual isotopes of the atom that naturally occur, but some elements have only one naturally occurring non radioactive isotope. The scale of atomic masses is now established by defining the mass of a carbon-12 isotope to be exactly 12. The atomic masses of other elements are defined by their mass ratios to a carbon-12 isotope.
Can the half life of a radioactive isotope decrease as the isotope decays?
No, the half-life of a radioactive isotope is a constant property of that particular isotope and does not change as it decays. The half-life is defined as the time it takes for half of the atoms in a sample to decay. Once set, the half-life remains constant regardless of how many atoms have decayed.
What is the nuclear charge of an atom with an atomic mass of 35amu and atomic number of 17?
The mass number of an isotope of an element is defined as the sum of the numbers of protons and neutrons in the nucleus of each atom of the isotope. The atomic number is defined as the number of protons only in the nucleus. Therefore, an atom with an atomic number. Since neutrons have no electric charge, the nuclear charge of the specified atom is 17 amu.
Why do you think changing the number of neutrons does not create a new element?
Changing the number of neutrons in an atom affects its isotope but does not change its fundamental chemical identity. An element is defined by the number of protons in its nucleus (its atomic number), while isotopes have varying numbers of neutrons. Thus, changing the number of neutrons does not create a new element.
How many neutrons and protons does a neutral atom of sodium with an atomic mass number of 23 have?
Every sodium atom has 11 protons, the atomic number of sodium. The isotope with mass number 23 has (23 - 11) or 12 neutrons, because the mass number of an isotope is defined as the sum of the numbers of protons and neutrons in the isotope.
What particular isotope is the basis for defining the atomic mass unit and the mole?
The atomic mass unit (amu) and the mole are defined based on the carbon-12 isotope (^12C). Specifically, one atomic mass unit is defined as one twelfth of the mass of a carbon-12 atom, which establishes a standard for measuring atomic and molecular masses. Additionally, one mole of substance is defined as containing exactly 6.022 x 10^23 entities (atoms, molecules, etc.), which corresponds to the number of atoms in 12 grams of carbon-12.
