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Atomic Mass
Atomic mass is the mass of protons, neutrons, and electrons in a single specific atom.
1,752 Questions
What is the dimension of atomic weight?
Atomic weight is a unit of measure whose unity value is that of the mass of a Hydrogen atom "1".
What is the mass of 18.8 moles of helium (He) atoms?
1 mole of helium weighs 4.0026 g
So. 18.8 of helium will weigh 75.25 g
Why is the atomic mass of an atom the average atomic mass?
It allows for the relative abundances of different isotopes.
See the Web Links for "Answers.com: Atomic mass" to the bottom for the answer. Atomic mass refers to the weight of an atom when compared to aribitary figure that is relative to other atoms.
The unit used is 1/12 the weight of a carbon atom (the most prolific around). Atomic mass is used to avoid using very small numbers that would otherwise result if you try to physically weigh an atom.
Note that atomic mass is not the same thing as atomic weight. See the Related Question to the left for more information.
The element symbol represents one mole of element , atomic number represents number of protons, atomic mass represents sum of protons and neutrons.
Which isotope has 17 neutrons and an atomic mass of 32?
The number of protons is the atomic mass minus the number of neutrons; in this instance 32 - 17 or 15. An atomic number of 15 corresponds to the element phosphorus; therefore, the isotope is P-32.
Sulphur is a non metal element. Atomic mass of it is 32.
Is bromine gas an atomic element?
Under most readily achieved temperature and pressure conditions, bromine gas exists as diatomic molecules. Bromine is always an element.
Why the atomic mass numbers listed for elements on the Periodic Table are not whole numbers.?
Why are atomic masses of elements not generally whole numbers? The atomic masses listed on the periodic table are a weighted AVERAGE of an element'sisotopes. ... An element's atomic number is the number of protons in its nucleus. Number of protons specifies atom type.
Which trem describes the sum of the number of protons and neutrons in an atom?
"Atomic mass" is the sum of the number of protons and neutrons in the nucleus of the atom.
All atoms of an element have the same number of protons. For example, all iron atoms have 26 protons. But while most (90%) have 30 neutrons, there are isotopes of iron that have anywhere from 26 to 36 neutrons. So the published "atomic mass" is the weighted average of the combined number of protons and neutrons. That's why the atomic number is always a whole number, but the atomic mass is a decimal.
Xenon is a metal element. Atomic mass of it is 131.29.
Why the stability decrease with increasing atomic mass?
Stability depends on to proton/neutron ratio; and this ratio increase with the atomic number.
Which two elements on a periodic table be reversed if you used atomic mass?
Tellurium (Te) and iodine (I) would be in reverse order if the elements were placed in order of atomic mass instead of atomic number.
How many places on the periodic table are the elements not in order by increasing atomic mass?
Classical pairs ate tellurium-iodine, thorium-protactinium, uranium-neptunium; and also some transuranium elements.
What is atomic mass of gold ion?
The atomic mass of a gold ion is the same as the atomic mass of a gold atom, which is approximately 196.97 atomic mass units. This value is calculated based on the average mass of all isotopes of gold and takes into account the abundance of each isotope.
Can you use atomic mass in a sentence?
Example sentence - We discussed various examples of atomic mass in our class today.
