Which one of the following is used as a standard for atomic mass.
(a) ₆C¹²
(b) ₇C¹²
(c) ₆C¹³
(d) ₆C¹⁴
Answers
Answered by
15
Which one of the following is used as a standard for atomic mass:
Correct Option is a : ₆C¹²
Explanation :
Actual masses of atom are very very small.It is not convenient to use such small and complicated figures in our calculations. Therefore it is necessary to define the atomic masses in such a way that we get simple figures.
So, carbon 12 atom has been assigned an atomic of exactly 12 atomic mass units.
Atomic mass unit=1/12 the mass of carbon 12 atom.
Atomic mass of an element is the relative mass of its atom as compared with the mass of an carbon-12 atom taken as 12 units.
The atomic mass indicates the number of times one atom is element is heavier than 1/12 of carbon -12 atom.
Correct Option is a : ₆C¹²
Explanation :
Actual masses of atom are very very small.It is not convenient to use such small and complicated figures in our calculations. Therefore it is necessary to define the atomic masses in such a way that we get simple figures.
So, carbon 12 atom has been assigned an atomic of exactly 12 atomic mass units.
Atomic mass unit=1/12 the mass of carbon 12 atom.
Atomic mass of an element is the relative mass of its atom as compared with the mass of an carbon-12 atom taken as 12 units.
The atomic mass indicates the number of times one atom is element is heavier than 1/12 of carbon -12 atom.
Answered by
9
The correct option is (a)
₆C¹²
Reason / Explanation :-
The C-12 isotope of the carbon is the stable isotope which is not much affected as compared to others elements, Thus it is chosen as the standard for expressing the atomic mass and the molecular mass of the substance.
The reason is the isotope of Carbon as 6 protons and 6 neutrons in its nucleus (₆C¹²). was given a mass of exactly 12.
Also ₆C¹² atomic mass could be measured accurately On compared to the other elements of the periodic table.
An interesting fact was also there , Before ₆C¹² , scientist used once H(because it is lightest ) and O( it is reactive then other element) as the standard . For finding Relative atomic mass of an element, but there is glitches as both hydrogen and oxygen are hard to manage , as H and O both are gases which surely have the chances of exiting the container while measuring the phenomenal experiment.
Hope it Helps . :-)
₆C¹²
Reason / Explanation :-
The C-12 isotope of the carbon is the stable isotope which is not much affected as compared to others elements, Thus it is chosen as the standard for expressing the atomic mass and the molecular mass of the substance.
The reason is the isotope of Carbon as 6 protons and 6 neutrons in its nucleus (₆C¹²). was given a mass of exactly 12.
Also ₆C¹² atomic mass could be measured accurately On compared to the other elements of the periodic table.
An interesting fact was also there , Before ₆C¹² , scientist used once H(because it is lightest ) and O( it is reactive then other element) as the standard . For finding Relative atomic mass of an element, but there is glitches as both hydrogen and oxygen are hard to manage , as H and O both are gases which surely have the chances of exiting the container while measuring the phenomenal experiment.
Hope it Helps . :-)
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