Answer
Verified
394.5k+ views
Hint: Atomic mass unit is also known as unified mass. This is represented by a small alphabetic letter, As we know that there are 26 alphabets in total, when numbered from a to z , this particular alphabet gets the number of 21.
Complete answer:
To find the symbol of atomic mass unit , we need to know what is this atomic mass unit mean by:
The mass of an atom is called atomic mass. It is measured in terms of atomic mass unit (amu).
Atomic mass unit (amu) is the one -twelfth mass of Carbon - 12 isotopes. It is also known as unified atomic mass (u).
We can convert atomic mass unit (u) can be converted into gram by the following equation:
${ 1u=1.66\times { 10 }^{ -24 }g }$
For example, the mass of one atom of Carbon is 12 u.
Mass of one atom of Oxygen is 16 u
Mass of one atom of Chlorine is 35.5 u.
Therefore, ‘u’ symbol represents the unit of atomic mass, amu.
So, the correct answer is “Option A”.
Additional Information:
Now, we can go to a much broader concept, which is the mole concept.
Mole concept gives that 1 mole is defined as the mass of the avogadro number of particles (molecules).
Avogadro number is also represented as ${ N }_{ A }$.
${ 1{ N }_{ A }=6.022\times { 10 }^{ 23 } }$
Universally accepted value of avogadro number is ${ 6.022137\times { 10 }^{ 23 } }$.
So, there are seven significant figures in avogadro number.
For example, in 1 mol of ${ O }_{ 2 }$, there are ${ 2\times }$ Avogadro numbers of atoms.
In 1 mol of ${ H }_{ 2 }{ O }$ , there are ${ 3\times }$ Avogadro numbers of atoms.
Now, we can have a look at the term atomicity, which is given by the number of element atoms present in a molecule.
For Example: atomicity of ${ O }_{ 2 }$ is 2 , atomicity of ${ S }_{ 8 }$ is 8.
Note: Although we use the term atomic mass unit for the mass of atom but in the usual , we don’t use atomic mass unit as such, rather we will be converting into gram and will use the mass in grams. SI unit of mass is kg. And so, using gram is usually preferred, as it can be easily converted into SI (kg) as well.
Complete answer:
To find the symbol of atomic mass unit , we need to know what is this atomic mass unit mean by:
The mass of an atom is called atomic mass. It is measured in terms of atomic mass unit (amu).
Atomic mass unit (amu) is the one -twelfth mass of Carbon - 12 isotopes. It is also known as unified atomic mass (u).
We can convert atomic mass unit (u) can be converted into gram by the following equation:
${ 1u=1.66\times { 10 }^{ -24 }g }$
For example, the mass of one atom of Carbon is 12 u.
Mass of one atom of Oxygen is 16 u
Mass of one atom of Chlorine is 35.5 u.
Therefore, ‘u’ symbol represents the unit of atomic mass, amu.
So, the correct answer is “Option A”.
Additional Information:
Now, we can go to a much broader concept, which is the mole concept.
Mole concept gives that 1 mole is defined as the mass of the avogadro number of particles (molecules).
Avogadro number is also represented as ${ N }_{ A }$.
${ 1{ N }_{ A }=6.022\times { 10 }^{ 23 } }$
Universally accepted value of avogadro number is ${ 6.022137\times { 10 }^{ 23 } }$.
So, there are seven significant figures in avogadro number.
For example, in 1 mol of ${ O }_{ 2 }$, there are ${ 2\times }$ Avogadro numbers of atoms.
In 1 mol of ${ H }_{ 2 }{ O }$ , there are ${ 3\times }$ Avogadro numbers of atoms.
Now, we can have a look at the term atomicity, which is given by the number of element atoms present in a molecule.
For Example: atomicity of ${ O }_{ 2 }$ is 2 , atomicity of ${ S }_{ 8 }$ is 8.
Note: Although we use the term atomic mass unit for the mass of atom but in the usual , we don’t use atomic mass unit as such, rather we will be converting into gram and will use the mass in grams. SI unit of mass is kg. And so, using gram is usually preferred, as it can be easily converted into SI (kg) as well.
Recently Updated Pages
Basicity of sulphurous acid and sulphuric acid are
Three beakers labelled as A B and C each containing 25 mL of water were taken A small amount of NaOH anhydrous CuSO4 and NaCl were added to the beakers A B and C respectively It was observed that there was an increase in the temperature of the solutions contained in beakers A and B whereas in case of beaker C the temperature of the solution falls Which one of the following statements isarecorrect i In beakers A and B exothermic process has occurred ii In beakers A and B endothermic process has occurred iii In beaker C exothermic process has occurred iv In beaker C endothermic process has occurred
What is the stopping potential when the metal with class 12 physics JEE_Main
The momentum of a photon is 2 times 10 16gm cmsec Its class 12 physics JEE_Main
How do you arrange NH4 + BF3 H2O C2H2 in increasing class 11 chemistry CBSE
Is H mCT and q mCT the same thing If so which is more class 11 chemistry CBSE
Trending doubts
State the differences between manure and fertilize class 8 biology CBSE
Why are xylem and phloem called complex tissues aBoth class 11 biology CBSE
Difference between Prokaryotic cell and Eukaryotic class 11 biology CBSE
Difference Between Plant Cell and Animal Cell
What would happen if plasma membrane ruptures or breaks class 11 biology CBSE
Give 10 examples for herbs , shrubs , climbers , creepers
What precautions do you take while observing the nucleus class 11 biology CBSE
What would happen to the life of a cell if there was class 11 biology CBSE
Change the following sentences into negative and interrogative class 10 english CBSE