Answer:
the answer for your question is 3 and 4
Answer:
None of the above
Explanation:
<h3>Because as N has the valence of 3 when it reacts with Cl of 1 as valence they will form NCl3</h3>
Well theory isnt proven. It means you have a strong idea about the subject your talking about. So if a scientist finds evidence that suggests something against the theory then it can be changed.
