Question

c) I am used to kill bacteria in drinking water.
Gболд:- alum
16 Find the values of A, B, C, D in the table
2. Identify the
Element
Atomic number Mass number No. of Protons/No. of Neutrons
No. of Electrons
20
Calcium
A
20
40
17
Chlorine
17
35
Nitrogen
14
16
15
D
Phosphorous
15
Reproduction and
TEET - 5
Modification in Plants​

Answer 1

Answer:

i did not understand the question

Explanation: