The anomalies of isotopes were solved in the modern periodic table because it is based on the atomic number but it also created a problem of isobars which have same atomic mass but a different atomic number, so how can it be said that it mended all the anomalies?

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Solution

Isobars are elements, which are chemically different but physically same. So, isobars are atoms of different elements having the same atomic mass but different atomic number. Since their number of electrons is different, their chemical properties are different. The light nuclei have unstable isobars. Heavy nuclei have stable isobars and these occur in pairs. Suppose the number of one isobar matches with that of another they are called mirror -nuclides of each other.
Examples of isobars are
$_{32} C e^{76},_{34} S e^{76}_{26} F e^{58},_{27} N i^{58}$
Since isobars are different elements they appear in dirrerent places in the periodic table.

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Similar questions

(a) State modern periodic law.

(b) How does the electronic configuration of the atom of an element relate to its position in the modern periodic table?

(d) Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium?

(e) Name the scientist who prepared the modern periodic table.

\frac{m \times a + n \times b}{m + n}

^{12} C

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

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

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