Skip to main content

ISOTOPES

ISOTOPES 
The atoms of the same element having same atomic number but different atomic masses are called isotopes.
  • Isotopes of an element are chemically identical but physically different from each other.
  • They were discovered by Soddy.
Similarities and differences between isotopes of an element 
Classification of elements on the basis of number of isotopes:
Elements are classified as mono isotopic and poly isotopic as discussed below:
Mono isotopic elements:
The elements having only one isotope are called mono isotopic elements.
Example: Fluorine, iodine, arsenic, gold, sodium etc.
Poly isotopic elements:
The elements having two or more isotopes are called poly isotopic elements.
Examples:
  • Nitrogen has three isotopes. 
  • Hydrogen has three isotopes.
  • Carbon has three isotopes. 
  • Oxygen has three isotopes. 
  • Sulphur has four isotopes.
  • Nickel has five isotopes.
  • Calcium and palladium has six isotopes each.
  • Cadmium has nine isotopes.
  • Tin has eleven isotopes.
  • Silver has sixteen isotopes.

Comments

Post a Comment

Popular posts from this blog

Mr chips important short questions.

Chapter#1 Question # 1:How does a person spend his time in old age after retirement? Answer : After retirement when a person becomes old, he has nothing to do. His time seems to pass like lazy cattle moving across a landscape(valley). Question # 2:Why did Chips keep on adjusting his timetable according to the school bells even after the retirement? Answer : After spending more than forty three(43) years at Brookfield, it was not possible for Chips to break his ties with school. He began to live across the road and Mrs. Wickets. That's why it was possible for Chips to keep on adjusting his timetable according to the school bells. Question # 3:How did Chips voice sound in old age? Answer : Although Chips had become old yet he did not loose the zeal and zeast for the life. So his voice remained resonant and lively even in his old age. Question # 4:What did Chips do before going to the bed? Answer : Chips was spending a pleasant and placid time at Mrs. Wickets after his retirem...
Post a Comment
Read more

Types of errors in physics

Errors: The difference between standard and experimental values is error. Classification Of Errors: ·                       systematic errors ·                       Random errors Systematic Errors:              The errors to which we can assign a cause usually they follow same trend of variations so a cause can be assigned to them e.g. Errors occurring due to the least count of the measuring instrument. Remedy:              Such errors can be controlled experimentally while carefully monitoring the measurement process. Random Errors:              To which we can’t assign a cause because they do not follow a trend. So these errors are due to unknown causes. Remedy: ...
1 comment
Read more

DISPLACMENT, DISTANCE, SPEED, VELOCITY AND ACCELERATION

Displacement: Shortest distance between two points is called displacement                                                                OR The displacement is a change in the position of body form its initial position to final position Unit:  SI unit of displacement is metre (m)                    Dimension:             The dimension of displacement is [L] VELOCITY: The time rate of change of displacement is known as velocity. It is a vector quantity. Its direction is along the direction of displacement. Mathematically...
Post a Comment
Read more