Question

9
3
11. Five atoms are labelled A to E.
Atoms
Mass No
Atomic No.
A
40
20
B
19
С
7
D
16
8
E
14
7
(a) Which one of these atoms :
(i) contains 7 protons
(ii) has electronic configuration 2, 7.​

Answer 1

Explanation:

9

3

11. Five atoms are labelled A to E.

Atoms

Mass No

Atomic No.

A

40

20

B

19

С

7

D

16

8

E

14

7

(a) Which one of these atoms :

(i) contains 7 protons

(ii) has electronic configuration 2, 7.

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