0
Why is the atomic mass scale also called the relative atomic mass scale?
Wiki User
∙ 12y ago
All atomic masses are determined by comparing them to the mass of an atom of carbon12. One Atomic Mass unit equals one twelfth the mass of an atom of carbon12. That's why its called relativeatomic mass.
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
What unit of measure is used to measure atomic weight?
expressed in unified atomic mass unit, amuHowever, for practical purposes in the laboratory the relative atomic mass is used so the unit would be gram. (Relative atomic mass compares the mass of all elements to that of the carbon-12 isotope taken as exactly 12)
What is the proton number also called?
The proton number is the atomic number.
What unit is used to meause weighted average atomic mass?
Relative atomic mass (RAM) has no unit, it's just a set of numbers, one for each element
What is relative atomic number?
The relative atomic mass is defined as: "The weighted mean of the relative isotopic masses of an element on the scale where 12C is 12 amu exactly; symbol Ar." (Heinemann Chemistry 1, 4th Edition).An atomic mass is always near to the number of Protons and Neutrons within an atom. (12C has a relative atomic mass of exactly 12 amu, but 13C has a relative atomic mass of 13.003 amu for example). Isotopes are Atoms with the same number of protons but different numbers of neutrons. Isotopes used in the calculation of relative atomic mass are naturally formed. The percentage of each type of isotope within a sample of an element is calculated (one way is by using a mass spectrometer). The values are then used to calculate the relative atomic mass.Example: Calculating hydrogen's relative atomic mass Hydrogen has 3 common isotopes that are naturally formed. 1H (protium), 2H (deuterium), and 3H (tritium). The atomic masses and the percentage of each of these found in a sample is found to be: Atomic Mass % in sample (values may not be exact)1H 1.008 amu 99.986%2H 2.014 amu 0.014%3H 3.016 amu 0.0001%These are then used to calculate the relative atomic mass as follows ((1.008 amu * 99.986%) + (2.014 amu * 0.014%) + (3.016 amu * 0.0001%)) / 100% Which equals approximately 1.008143856 amu.
What does the atomic weight of an atom represent?
Atomic weight is sum of the number of protons and neutrons in the nucleus of an atom. Protons and neutrons, as members of the nucleus, are sometimes called nucleons. The atomic weight is sometimes said to be the nucleon number.The relative atomic mass (Ar) (also known as atomic weight and average atomic mass) is the average of the atomic masses of all the chemical element's isotopes as found in a particular environment, weighted by isotopic abundance. This is frequently used as a synonym for the standard atomic weightand it is not incorrect to do so since the standard atomic weights are relative atomic masses, although it is less specific to do so. Relative atomic mass also refers to non-terrestrial environments and highly specific terrestrial environments that deviate from the average or have different certainties (number of significant figures) than the standard atomic weights.A link is provided to the Wikipedia article on atomic weight.
What element has a relative atomic mass of 15.5?
Relative atomic mass, also called atomic weight, is listed on the periodic table for each element. There is no element listed on the periodic table with a relative atomic mass of 15.5.
What minor scale mode is just a major scale starting on the sixth scale degree?
I'm not sure if this is the answer your looking for, but by playing a scale, starting on the sixth degree in a major scale (also called aeolian mode), you will essentially be playing a natural minor scale. Specifically, the relative minor.
What is the difference between atomic mass and relative atomic mass?
Atomic mass is the measure of a mass of one atom in relation to 1/12 mass of Carbon 12 atom and measured in atomic mass unit(amu) or Dalton unit or grams/mol.Relative atomic mass is also the relative mass but does not have a unit but a ratio number.
Why Celsius scale is also called centigrade scale?
temperature
What unit of measure is used to measure atomic weight?
expressed in unified atomic mass unit, amuHowever, for practical purposes in the laboratory the relative atomic mass is used so the unit would be gram. (Relative atomic mass compares the mass of all elements to that of the carbon-12 isotope taken as exactly 12)
What are the two definitions for the word scale?
Scale (n) is a flake of chitinous substance which protects the skins of fish and some reptiles. Scale (n) is also a device for weighing things. Scale (n) also means the relative size of an image or model.
Is the potential hydrogen scale also called a pH scale?
Yes it is.
What is Atomic energy is also called?
nuclear energy
The Fahrenheit absolute scale is called the scale?
The Fahrenheit scale is not absolute and also is obsolete.The absolute scale is Kelvin.
What is the atomic mass minus the number of neutrons?
The number of protons, also called the atomic number.
What is the number of protons in an atom known as?
It is called the atomic no. of element. It is also equal to the no. of electrons in the atom.
What does atomic weight refer to?
The mass of the protons plus the mass of the neutrons, also called the atomic mass.
