Advertisements
Advertisements
प्रश्न
Define the term of mass number.
What is meant by the term mass number with reference to an atom
Advertisements
उत्तर
Mass number [A]: “Is the total number of protons and neutrons in the atom of an element.”
A = P + n
संबंधित प्रश्न
Define the atomic mass unit.
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.
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 atomic mass of an element.
What is meant by saying that 'the atomic mass of oxygen is 16' ?
Explain the need for a reference atom for atomic mass. Give some information about two reference atoms.
Define the following form:
Atomic mass number
Define atomic mass unit.
Define the term:
Mass number
A hydrocarbon contains 4.8g of carbon per gram of hydrogen. Calculate the gram atom of each.
Explain the following:
An element has atoms with different mass numbers.
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.
Select the correct answer from the answer in the bracket to complete the sentence.
An element has electronic configuration 2, 8, 1 and 12 neutrons. Its mass no. is ________.
Draw the structure of oxygen and sulphur atoms.
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 % of oxygen in Al2(SO4)3. (Atomic mass: Al-27, O-16, S -32)
What are the postulates of Bohr’s model of an atom?
The ratio of masses of H and O in H2O is ______.
