Question

5. Study the data given below and answer the questions which follows:
Atom
Electron
Proton
Neutron
А
2.
3
4
B
10
9
8
С C
8
8
8
D
8
8
10
(a) Write the atomic number and mass number of 'D'.
(b) Which represent a pair of isotopes?
(c) Write the electronic configuration, valency and structure of the atom 'C'.
(d) Which is an anion? Support your answer with reason.​

Answer 1

Answer:

Explanation:

Neutral species :  species with the same number of protons and electrons so A, F and G are neutral.

Negatively charged species :  species with more number of electrons than protons so B and E are negatively charged species.

Positively charged species: species with a higher number of protons than electrons, so C and D are positively charged species.

conventional symbols :

5

10

​  

A

7

14

​  

B  

3−

 

19

39

​  

C  

+

 

30

66

​  

D  

2+

 

35

81

​  

E  

−

 

5

11

​  

F

9

19

​  

G