CBSE Class 9 Answered
On the basis of number of protons, neutrons and electrons in the samples given below, identify (a) the cation (b) the pair of isobars (c) the pair of isotopes.
Sample
Protons
Neutrons
Electrons
A
17
18
16
B
18
19
18
C
17
20
17
D
17
17
17
Asked by Topperlearning User | 14 May, 2014, 06:40: AM
Expert Answer
Cation: A since it has less number of electrons than the protons.
Isobars: B and C since they have the same mass number (sum of no. of protons + neutrons).
Isotopes: C and D since they have the same atomic number (no. of protons).
Answered by | 14 May, 2014, 08:40: AM
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