If $$R=\left\{\left(x,y\right):y=2x\right\}$$ is a relation in $$A=\left\{1,2,3,4,6,7,8\right\}$$ then write all the elements of $$R$$

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Single Choice
Which of the following is/are same in isotopes? I. Mass number II. Atomic number III. Arrangement of orbital electrons
Solution
Isotopes are atoms of same element having same atomic number and different mass number.
They have same number of electrons and same number of protons but different number of neutrons.
Hence, the option (D) II and III only, is the correct answer.
SIMILAR QUESTIONS
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