Advertisements
Advertisements
Questions
Define the term of mass number.
What is meant by the term mass number with reference to an atom
Advertisements
Solution
Mass number [A]: “Is the total number of protons and neutrons in the atom of an element.”
A = P + n
RELATED QUESTIONS
An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbol to this ion.
Define gram atomic mass of a substance. How much is the gram atomic mass of oxygen ?
What is meant by atomic mass number?
Define atomic mass unit.
Ordinary chlorine gas has two isotopes \[\ce{^35_17Cl}\] and \[\ce{^37_17Cl}\] in the ratio of 3 : 1. Calculate the relative atomic mass of chlorine.
What would be the reason for an element to have atoms with different mass numbers?
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.
Mass of 1 mole of Nitrogen atom is ______
The average atomic mass of hydrogen is ______ amu.
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.
Calculate the % relative abundance of B-10 and B-11, if its average atomic mass is 10.804 amu.
One electron is present in the outermost shell of the atom of an element X. What would be the nature and value of charge on the ion formed if this electron is removed from the outermost shell?
Chlorine exists in two isotopic forms, \[\ce{Cl-37}\] and \[\ce{Cl-35}\] but its atomic mass is 35.5. This indicates the ratio of \[\ce{Cl-37}\] and \[\ce{Cl-35}\] is approximately
An atom having atomic mass number 13 has 7 neutrons. What is the atomic number of the atom?
Atoms are so tiny their mass number cannot be expressed in grams but expressed in ______.
If the atomic mass unit ‘u’ were defined to be `1/5 "th"` of the mass of an atom of C-12, what would be the atomic weight of nitrogen in amu or ‘u’ in this state? Atomic weight of N on the conventional scale is 14.
