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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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What is the atomic mass of 40.08 rounded?

The atomic mass of calcium (Ca), which is approximately 40.08 atomic mass units (amu), can be rounded to 40.1 amu for simplicity. This rounded value reflects the average mass of calcium's isotopes weighted by their natural abundances.


What is Iron atomic mass rounded?

The atomic mass of iron is approximately 55.85 atomic mass units (amu) when rounded. This value reflects the weighted average of the isotopes of iron, primarily iron-56, and takes into account their relative abundances.


The difference between the atomic number of an element and its atomic mass?

The atomic number of an element represents the number of protons in its nucleus, which determines its position on the periodic table and its chemical properties. The atomic mass (or atomic weight) of an element reflects the average mass of its isotopes, considering both protons and neutrons. In general, the atomic number is a whole number without units, while atomic mass is usually expressed in atomic mass units (amu).


The atomic mass listed in the periodic table is the?

The atomic mass listed in the periodic table is the weighted average of the masses of all the isotopes of an element, taking into account their abundance in nature. It is measured in atomic mass units (amu) and provides an average value that reflects the isotopic distribution of the element.


How was the periodic table first organized atomic number or atomic mass?

The periodic table was first organized by atomic mass. However, after the discovery of isotopes and inconsistencies around this method, it was later rearranged based on atomic number, which reflects the number of protons in an atom's nucleus.


What would you expect the atomic mass of a helium atom to be Explain your answer?

The atomic mass of a helium atom is approximately 4 atomic mass units (amu). This value reflects the combined mass of its two protons and two neutrons, as helium has two protons in its nucleus and typically two neutrons. The mass of electrons is negligible compared to that of protons and neutrons, so it does not significantly affect the atomic mass. Thus, the expected atomic mass aligns closely with the sum of the nucleons in the helium nucleus.


What does the atomic weight mass number of an element represent?

The atomic weight, or atomic mass, of an element represents the average mass of its isotopes, weighted by their natural abundance. It is typically expressed in atomic mass units (amu) and reflects the total number of protons and neutrons in the atomic nucleus, which collectively define the mass number. While the mass number is a whole number indicating the total count of protons and neutrons in a specific isotope, the atomic weight accounts for the relative proportions of all isotopes of the element found in nature.


What are the number of protons plus the number of neutrons gives the atomic?

The number of protons plus the number of neutrons in an atom gives the atomic mass number. This total reflects the combined mass of the nucleus of an atom, as protons and neutrons contribute significantly to its mass. The atomic mass number is often used to distinguish between different isotopes of an element.


What is bigger the atomic mass or atomic number?

Atomic no.=no. of protons Atomic mass=no. of protons+no. of neutrons Hence, atomic mass is greater


What is the atomic mass-?

The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.


The mass of an atom usually expressed in atomic mass units is its?

Atomic mass


What is the atomic mass of silver?

The atomic mass (or weight) of silver is 107.8682 amu (atomic mass units)