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Atomic Mass is the mass of an atom
Atomic weight is the average mass of an atom based on the abundance of different isotopes
No, because mass and weight are two different things. Weight is gravitational pull, while mass is how much matter there is in an object.
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Can 2 isotopes of the same element differ in the number of protons?
An element is defined by the number of protons, so this cannot vary. Isotopes of a particular element are different in the number of neutrons within the atoms. These isotopes are said to be comparatively "lighter" or "heavier" than other isotopes based on the total of protons and neutrons (atomic mass).
Did the existence of isotopes affect the validity of the atomic theory?
Dalton's theory said that "atoms of the same element are the same as each other in terms of mass, color, and size." We know that this cannot be true because isotopes of the same element, oxygen for example O-16 and O-17, have different mass numbers (atomic mass). Dalton's theory said that "atoms of the same element are the same as each other in terms of mass, color, and size." We know that this cannot be true because isotopes of the same element, oxygen for example O-16 and O-17, have different mass numbers (atomic mass).
In alpha decay the parent element and the daughter element can be different isotopes of the same element but in beta decay the parent and daughter element are always the same?
No. In both the cases the element would definitely change. As alpha particle comes out then the new element would have two less in atomic number where as in beta particle decay the new element will have one higher in atomic number.
True or false The number of neutrons always equals the number of protons?
False. The number of electrons always equals the number of protons for an element and this is called the atomic number of an element. The number of neutrons in an element depends on other factors and varies by element and the same element can have different versions with a different number of neutrons. Each version is called an isotopes. The sum of the protons and neutrons in an atom is called the atomic weight. Hydrogen has three isotopes with 0, 1, or 2 neutrons, with atomic weights 1,2, 3). Isotopes with 1 or 2 neutrons are extremely rare. Carbon has four isotopes. It can have 5, 6, 7, or 8 neutrons (atomic weights 11, 12, 13, 14). We commonly refer to different isotopes by its name and weight as in carbon-11, carbon-12, carbon-13, carbon-14. Carbon-12 is common and everywhere. the others are very rare. Carbon-11 and carbon-14 are considered unstable and tend to brake down into other elements over a period of time releasing energy as it happens. This is called radioactivity.
Is mixtures or isotopes are atoms of the same element with different numbers of neutrons?
Isotopes are atoms of the same element with different numbers of neutrons. Mixtures, on the other hand, are combinations of different substances that are physically mixed together, but not chemically bonded.
Is it true that The atomic weight is only an average of relative weights of an atom and its isotopes and it may vary from the weight of a specific isotope?
Yes, that is correct. The atomic weight displayed on the periodic table is an average weight taking into account the abundance of each isotope of an element. The atomic weight may vary slightly depending on the isotopic composition of a sample.
Base weight a system of comparing atomic weights to carbon is it true or false?
True. The unit for the atomic weights of chemical elements is the relative atomic mass unit (1/12 from the atomic mass of the isotope 12C). Note that atomic weights is used for elements and atomic mass for isotopes.
The number of neutrons is equal to the atomic number true or false?
False as a generalization but true for some isotopes. The atomic number is the number of protons in a nucleus, which may coincidentally be the same as the number of neutrons but is not required to be.
Is it true Different isotopes for the same element will always have the same numbers of neutrons?
Yes. it is true. Isotopes of the same element always have different number of neutrons.
Can 2 isotopes of the same element differ in the number of protons?
An element is defined by the number of protons, so this cannot vary. Isotopes of a particular element are different in the number of neutrons within the atoms. These isotopes are said to be comparatively "lighter" or "heavier" than other isotopes based on the total of protons and neutrons (atomic mass).
The atomic number of isotopes is determined by the number of atoms. true or false?
False. Number of neutrons.
What is true about all the isotopes of an element?
All isotopes of an element have the same number of protons. When they are not ionic, they have the same number of electrons. And, for all practical purposes, they behave identically as chemicals. share most of the same physical properties, and chemical properties. They have different number of neutrons.
Is an element made up of atoms with the same number of protons?
Isotopes of an element have the same number of protons and electrons, but different numbers of neutrons. Any element is made up of a combination of isotopes. For example if you are looking at carbon, there is carbon-12 and carbon-13, which are stable, and carbon-14 which is radioactive. This is true for many elements, and the atomic mass, the one displayed on the periodic table, is an average of the masses of all of the isotopes. But the atomic number of all isotopes is the same. http://www.chem4kids.com/files/atom_isotopes.html http://www.colorado.edu/physics/2000/isotopes/index.html
Which is not true all isotopes of an element have the same number of electrons?
All neutral atoms of an element, including any of its isotopes, always do have the same number of electrons. The existence of isotopes has nothing to do with the number of electrons in an atom. Instead, the number of neutrons varies between isotopes of the same element. The number of electrons varies from that of a neutral atom only if an ion of the element is formed.
Did the existence of isotopes affect the validity of the atomic theory?
Dalton's theory said that "atoms of the same element are the same as each other in terms of mass, color, and size." We know that this cannot be true because isotopes of the same element, oxygen for example O-16 and O-17, have different mass numbers (atomic mass). Dalton's theory said that "atoms of the same element are the same as each other in terms of mass, color, and size." We know that this cannot be true because isotopes of the same element, oxygen for example O-16 and O-17, have different mass numbers (atomic mass).
Does the Bohr model look the same for zinc and its isotopes?
Yes, it is true.
Did postulate 4 of Daltons atomic theory holds true now?
No, postulate 4 of Dalton's atomic theory, which stated that atoms of the same element are identical, is not entirely true. We now know that isotopes exist, which are atoms of the same element with different numbers of neutrons. This means that atoms of the same element can have slightly different masses.
