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प्रश्न
Define the term of mass number.
What is meant by the term mass number with reference to an atom
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उत्तर
Mass number [A]: “Is the total number of protons and neutrons in the atom of an element.”
A = P + n
संबंधित प्रश्न
An ion with mass number 37 possesses one unit of negative charge. If the ion contains 11.1% more neutrons than the electrons, find the symbol of the ion.
How many atoms are present in one gram atomic mass of a substance ?
Define gram atomic mass of a substance. How much is the gram atomic mass of oxygen ?
What is meant by atomic mass number?
Define the following form:
Atomic mass number
Explain the following:
An element has atoms with different mass numbers.
Name or state the following:
Atoms of the same element differing in mass number
Write down the mass number of the atom having 20 neutrons and 15 protons.
Select the correct answer from the answer in the bracket to complete the sentence.
An atom with electronic configuration 2, 7 and mass number 19 will have ________ neutrons.
Give a reason for the following:
The mass number of an atom is slightly less than the actual atomic mass.
Which of the following has the smallest mass?
The sum of the numbers of protons and neutrons of an atom is called its ______
Relative atomic mass is otherwise known as ______.
The gram atomic mass of an element has no unit.
Answer the following question using the data given below:
- Assertion: The Relative Atomic mass of aluminium is 27
- Reason: An atom of aluminium is 27 times heavier than 1/12th of the mass of the C – 12 atom.
Write the different types of isotopes of oxygen and their percentage abundance.
Calculate the % relative abundance of B-10 and B-11, if its average atomic mass is 10.804 amu.
The ratio of masses of H and O in H2O is ______.
