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Isobars and Isotopes

Isobars are a...

Question

Isobars are atoms having same number of__________

A

neutrons

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B

protons + neutrons

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C

protons

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D

electrons

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Solution

The correct option is B protons + neutrons
Isobars are atoms having same mass number.
Mass number = number of protons + number of neutrons

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Question 07

Two atoms are said to be isobars if ?

(a) They have same atomic number but different mass number

(b) They have same number of electrons but different number of neutrons

(c) They have same number of neutrons but different number of electrons

(d) Sum of the number of protons and neutrons is same but the number of protons is different

Q. In a sample of ethyl ethanoate (CH₃COOC₂H₅), the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it ?

(a) one of the oxygen atoms has gained electrons

(b) one of the oxygen atoms has gained protons

(c) the two oxygen atoms are isotopes

(d) the two oxygen atoms are isobars

Q. The atomic species A and B have different number of protons but the same number of nucleons. On the other hand, the atomic species X and Y have the same number of protons but different number of nucleons.
Which pair is an example of isobars? Why?

Q. Isobars are atoms having same number of__________

Q. An element is represented by

_{Z} X^{A}

, where Z is atomic number which is also equal to number of proton, A is mass number and X is symbol of the element.
Mass number (A) = Number of protons (Z) + Number of neutrons.
Isotopes: Atoms having same number of proton
Isobar: Elements having same mass number
Isotones: Elements having same number of neutron (A-Z)

Which of the following is a pair of isobar?

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