Isobars





Isobars

Isobars are atomic species having the same mass number but different atomic number e.g. ^{210}_{82}Pb, ^{210}_{83}Bi, ^{210}_{84}Po; ^{40}_{18}Ar, ^{40}_{20}Ca etc. they differ in chemical properties, however physical properties related to mass are same

Isotones are atoms having same number of neutrons but different mass number e.g.  ^{30}_{14}Si, ^{31}_{15}P, ^{31}_{16}Si. (All have 16 neutrons).

Isomers (nuclear) are atoms having the same mass number and same atomic number but with different radioactive properties e.g. ^{80}_{35}Br.

The above four terms may be summed up as:

Term No. of Protons No. of Neutrons Mass number Example
Isotopes Same Different Different ^{16}_{8}O, ^{18}_{8}O
Isobars Different Different Same ^{40}_{18}Ar, ^{40}_{18}Ca
Isotones Different Same Different ^{30}_{14}Si, ^{31}_{15}P, ^{32}_{16}S
Isomers Same Same Same ^{80}{35}Br

 

Isodiaphere: Have same (n – z) or (A – 2z) value

Ex.

_9 F^{19}

n = 10

z = 9

n – Z = 10 -9 = (1)

A -2Z = 19 -18 = (1)

 

_{19}K^{39}

N = 20

Z = 19

n – Z = 20 -19 = (1)

A – 2Z = 39 -38 = (1)



Related posts:

  1. Fusion, Fission Fusion, fission, isotopes, isobars   Atoms are the buldig blocks...
  2. Group Displacement Law Group displacement law Fajan, Russel and Soddy (1913) gave group...
  3. Atomic Number This worksheet consists of questions and answers related to Atomic...
  4. Isotopes Isotopes Discovered by Soddy; atoms of a given element which...
  5. Radioactivity Radioactivity...