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Because most naturally occurring elements are a mixture of isotopes, each having a different Atomic Mass. These individual isotopic atomic masses must be combined accounting for the amount of each isotope of the element is present to get a weighted average atomic mass.
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Why Cu has a relative atomic mass?
Copper (Cu) has a relative atomic mass because it is an average value that considers the different isotopes of copper and their abundance in nature. The relative atomic mass provides a more accurate representation of the average mass of an atom of copper compared to using just the mass number of the most abundant isotope.
Are elements in the periodic table organized by their atomic numbers or their average masses?
If we still had the modern day model of the Periodic Table, the elements wouldn't be arranged by metals, metalloids, or nonmetals, they wouldn't be in the same families, and periods, and they would just be scattered abroad the Periodic Table. Not a great situation. LOL! :D
Why does the atomic mass on the periodic table progressively changes left to right and top to bottom why?
Because there are increasingly more protons, electrons, and neutrons. Atomic mass is the average number of neutrons in all of the isotopes(different types) of a specific element, meaning you can sometimes have decimal masses. But, the atomic number is never a decimal because the atomic number is just a numbering system for all the elements.
What is the difference between the average atomic mass given on the periodic table and the mass of an atom?
The average atomic mass on the periodic table represents a weighted average of all isotopes of an element based on their natural abundance, not the mass of a single atom. In contrast, the mass of a specific atom (or isotope) is an exact value for that isotope.
State which two elements from the first 20 elements of the modern periodic table are not arranged in order of increasing atomic mass?
Cobalt and Nickel are the two elements from the first 20 elements of the periodic table that are not arranged in order of increasing atomic mass. This is due to the placement of cobalt with a slightly lower atomic mass compared to nickel, which occurs due to the meticulous arrangement of elements based on their chemical properties and not just atomic masses.
Why Cu has a relative atomic mass?
Copper (Cu) has a relative atomic mass because it is an average value that considers the different isotopes of copper and their abundance in nature. The relative atomic mass provides a more accurate representation of the average mass of an atom of copper compared to using just the mass number of the most abundant isotope.
Are elements in the periodic table organized by their atomic numbers or their average masses?
If we still had the modern day model of the Periodic Table, the elements wouldn't be arranged by metals, metalloids, or nonmetals, they wouldn't be in the same families, and periods, and they would just be scattered abroad the Periodic Table. Not a great situation. LOL! :D
What is the atomic weight for copper?
Copper can be found on the Periodic Table of Elements. Copper's symbol is Cu, and the atomic number is 29. The atomic mass is hard to find searching the Internet, but here it is. The atomic mass for Copper is 63.546, also recognized as just 63.Atomic Number: 29Atomic mass: 63.546, or just 63**Note: The atomic mass for Copper and some other chemicals cannot be found on WebElements.
What do elements in the periodic table do?
The periodic table is just a way of grouping elements according to their atomic numbers. It helps scientists to understand why different elements react in different ways.
What is oxide atomic number?
The atomic number of oxide depends on the specific element it is composed of. For example, the atomic number of oxygen, which commonly forms oxides, is 8. Other elements forming oxides will have their own unique atomic numbers.
How do you find the atomic mass of the elements?
One should use an appropriate periodic table or look up in wikipedia by typing the elements name correctly and scroll down the collumn at the right (looking for 'standard atomic weight' or just 'atomic weight').This is not exactly the same as the mass number.
Why does the atomic mass on the periodic table progressively changes left to right and top to bottom why?
Because there are increasingly more protons, electrons, and neutrons. Atomic mass is the average number of neutrons in all of the isotopes(different types) of a specific element, meaning you can sometimes have decimal masses. But, the atomic number is never a decimal because the atomic number is just a numbering system for all the elements.
What is the difference between the average atomic mass given on the periodic table and the mass of an atom?
The average atomic mass on the periodic table represents a weighted average of all isotopes of an element based on their natural abundance, not the mass of a single atom. In contrast, the mass of a specific atom (or isotope) is an exact value for that isotope.
Why are atomic masses of elements usually not whole numbers?
The atomic mass listed in the periodic is found by taking the average of all the different isotopes of a given element found in nature, weighted for their natural abundance.Note that the atomic mass is not the same as the atomic weight. The atomic mass is the weight of one specific isotope of one atom, and is expressed in "atomic mass units" or amu. The atomic weight is expressed in grams per mole (g/mol) and is the weighted average of all the isotopes weighted by their abundance.See the Web Links for more information about atomic mass and atomic weight.
State which two elements from the first 20 elements of the modern periodic table are not arranged in order of increasing atomic mass?
Cobalt and Nickel are the two elements from the first 20 elements of the periodic table that are not arranged in order of increasing atomic mass. This is due to the placement of cobalt with a slightly lower atomic mass compared to nickel, which occurs due to the meticulous arrangement of elements based on their chemical properties and not just atomic masses.
How is the molar mass of an element related to average atomic mass?
The molar mass of an element is the mass of one mole of atoms in that element. It is directly related to the average atomic mass, which is the weighted average of the masses of all isotopes of that element based on their natural abundance. The molar mass is usually very close to the average atomic mass of the element.
What elements have an atomic mass of less than 10?
Elements with an atomic mass of less than 10 include hydrogen (1.008), helium (4.0026), lithium (6.94), beryllium (9.0122), and boron (10.81). Among these, hydrogen, helium, lithium, and beryllium all have atomic masses below 10, while boron is just above. These elements are primarily found in the first two rows of the periodic table.
