0
What atom is used as a reference for the atomic masses of all other elements?
Wiki User
∙ 8y ago
Carbon-12 was assigned an exact Atomic Mass to act as the standard for atomic mass of all other elements
Wiki User
∙ 8y ago
Add your answer:
Earn +20 pts
Which element has the greatest atomic mass Li Cl C?
Among these three elements, Cl has the greatest mass, as can be seen from any periodic table or other reference work that shows atomic masses.
Are two atoms of different elements because they have close but different masses?
An element is made up of only one type of atom. Atoms are only different from each other due to their atomic number - which is the number of protons. Different elements may have different relative atomic masses, but it is the differing number of protons in each atom that determines which element it is.
What is the atomic mass of an element and how is it determined?
The atomic mass of a radioactively stable element is defined as the mass, usually measured in grams, of Avogadro's Number of atoms of the element as obtained from natural sources on Earth. For most elements, this atomic mass will be an average, weighted by natural isotope percentages, of the individual isotopes of the atom that naturally occur, but some elements have only one naturally occurring non radioactive isotope. The scale of atomic masses is now established by defining the mass of a carbon-12 isotope to be exactly 12. The atomic masses of other elements are defined by their mass ratios to a carbon-12 isotope.
The atomic mass of an element depends upon the?
1. atomic number and the ratios of its naturally occurring isotopes.2. atomic number and the half-lives of each of its isotopes.3. masses and the ratios of its naturally occurring isotopes.4. masses and the half-lives of each of its isotopes.answer: 3. masses and the ratios of its naturally occurring isotopes.
When arranged by a atomic masses elements fall into groups with other elements with?
If what is meant is by mean atomic mass , then they almost fall into "groups" or families of elements with similar chemical properties. HOWEVER there are exceptions where the sequence is "odd" notablyArgon is heavier than potassiumTellurium is heavier than iodineThorium is heavier than ProtactiniumPutting potassium with the noble gases and argon in the alkali metals would be confusing.This is why the periodic table is sequenced by ATOMIC NUMBER not by mean atomic mass.
Which element has the greatest atomic mass Li Cl C?
Among these three elements, Cl has the greatest mass, as can be seen from any periodic table or other reference work that shows atomic masses.
What is the law of traid?
A German chemist Dobernier observed relationship between atomic masses of several groups of three elements called traids.In these groups the central or middle element had atomic mass average to the other two elements.
Are two atoms of different elements because they have close but different masses?
An element is made up of only one type of atom. Atoms are only different from each other due to their atomic number - which is the number of protons. Different elements may have different relative atomic masses, but it is the differing number of protons in each atom that determines which element it is.
What is the contribution of Dobereiner to the periodic table?
He provided the base for the classification of elements he says the elements are atomic masses nearly same he arranged the atomic masses of the middle element is approximately the arithmetic mean of other two elements,He first gave us the ''Law of Triads''...where he made lists of three elements each, and showed that the mass of the middle element is approximately equal to the average mass of the other two elements.
Who arranged the periodic table in masses?
Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.
What is the atomic mass of an element and how is it determined?
The atomic mass of a radioactively stable element is defined as the mass, usually measured in grams, of Avogadro's Number of atoms of the element as obtained from natural sources on Earth. For most elements, this atomic mass will be an average, weighted by natural isotope percentages, of the individual isotopes of the atom that naturally occur, but some elements have only one naturally occurring non radioactive isotope. The scale of atomic masses is now established by defining the mass of a carbon-12 isotope to be exactly 12. The atomic masses of other elements are defined by their mass ratios to a carbon-12 isotope.
The atomic mass of an element depends upon the?
1. atomic number and the ratios of its naturally occurring isotopes.2. atomic number and the half-lives of each of its isotopes.3. masses and the ratios of its naturally occurring isotopes.4. masses and the half-lives of each of its isotopes.answer: 3. masses and the ratios of its naturally occurring isotopes.
Why were Mendeleevs efforts on the peridic table more successfully the other scientist?
Mendeleev's table was more systematic. Elements were arranged in order of atomic masses.
State the name and the mass of the isotope relative to which all atomic masses are measured?
Carbon-12 is used as the standard by which the atomic masses of other nuclides are measured.
When arranged by a atomic masses elements fall into groups with other elements with?
If what is meant is by mean atomic mass , then they almost fall into "groups" or families of elements with similar chemical properties. HOWEVER there are exceptions where the sequence is "odd" notablyArgon is heavier than potassiumTellurium is heavier than iodineThorium is heavier than ProtactiniumPutting potassium with the noble gases and argon in the alkali metals would be confusing.This is why the periodic table is sequenced by ATOMIC NUMBER not by mean atomic mass.
Who invented piriodic table?
Dmitri Mendeleev created the first periodic table according to atomic mass in 1869. Others before Mendeleev had organized the elements according to their properties and were able to discern periodicity, although Mendeleev is generally accepted as the creator of the table.With the information he gathered about the elements, he was able to see that there were missing elements that hadn't been discovered. He could figure out the atomic masses of the missing elements by averaging the atomic masses of the elements above and below the missing one. One such element, which he called "eka-silicon" (eventually Ge) was missing, but with understanding of the patterns the periodic table made, he predicted the elements appearance, melting point, atomic mass, density, formula of oxide, and formula of chloride.Throughout the years, other scientists were able to find or create these missing elements to form the table we know today. Today's periodic table is ordered by atomic number instead of atomic mass (as Mendeleev had started). Henry Moseley was the first to order the elements by atomic number so elements would fit together in groups/families and periods better in 1913.
What is the resemblance between newland classification element and music?
what is the resemble between newland classification element and music
