An isobar of ${ }_{20} Ca^{40}$ is

  • A
    ${ }_{18} Ar^{40}$
  • B
    ${ }_{20} Ca^{38}$
  • C
    ${ }_{20} Ca^{42}$
  • D
    ${ }_{18} Ar^{38}$

Explore More

Similar Questions

If the mass attributed to a neutron were halved and that attributed to the electron were doubled,the atomic mass of $_6C^{12}$ would

Difficult
View Solution

Symbols $_{35}^{79} Br$ and $^{79} Br$ can be written,whereas symbols $_{79}^{35} Br$ and $^{35} Br$ are not acceptable. Answer briefly.

Which one of the following is not an iso-electronic pair?

An ordinary oxygen sample contains:

If the atomic weight of an element is $23$ times that of the lightest element and it has $11$ protons,then it contains

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial
For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free
For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo