Question: The following table gives the number of electrons, protons, and neutrons in atoms or ions of four elements, identified only as A, B, C, and D. Write the isotopic symbol for each element.
|
Element
|
No. of protons
|
No. of electrons
|
No. of neutrons
|
Isotopic symbol
|
|
A
|
5
|
5
|
5
|
|
|
B
|
7
|
10
|
7
|
|
|
C
|
19
|
18
|
20
|
|
|
D
|
30
|
28
|
36
|