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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 bromine's atomic mass rounded?
Bromine's atomic mass is approximately 79.9 atomic mass units (amu) when rounded. This value reflects the weighted average of the masses of its stable isotopes, primarily bromine-79 and bromine-81.
What is the rounded atomic mass for helium?
The rounded atomic mass of helium is approximately 4 u (atomic mass units). Helium has an atomic mass of about 4.0026 u, which is commonly rounded to 4 for simplicity in many contexts. This value reflects the most abundant isotope of helium, helium-4.
Is this true or false. The atomic mass of hydrogen is one?
False. The atomic mass of hydrogen is approximately 1.008 atomic mass units (amu), not exactly one. This value accounts for the presence of its isotopes, primarily protium, deuterium, and tritium. The average atomic mass reflects the natural abundance of these isotopes.
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.
Is the mass of an electron taken into account for the atomic mass?
Yes, the mass of an electron is technically included in the atomic mass of an atom, but its contribution is negligible compared to that of protons and neutrons. Atomic mass primarily reflects the mass of the nucleus, which contains protons and neutrons, as they are much more massive than electrons. Consequently, while electrons do contribute to the total mass, their effect on the overall atomic mass is minimal.
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 is the atomic mass of chlorine rounded?
The atomic mass of chlorine is approximately 35.5 atomic mass units (amu). When rounded, it is commonly expressed as 36 amu. This value reflects the weighted average of the isotopes of chlorine, primarily chlorine-35 and chlorine-37.
What does irons atomic mass represent?
Iron's atomic mass 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 nucleus of an iron atom. The atomic mass of iron is approximately 55.85 amu, indicating the combined mass of its most stable isotopes, primarily iron-56.
What statement is true about the atomic mass?
The atomic mass of an element is the weighted average mass of its isotopes, measured in atomic mass units (amu). It reflects the number of protons and neutrons in the nucleus of an atom and is typically not a whole number due to the presence of isotopes and their relative abundances. Atomic mass is often listed on the periodic table and is used to determine the mass of a mole of atoms in grams.
