Question

write a short note on significance of valence electron and valency​

Answer 1

Explanation:

refer to the above attachment ^_^

please mark it as brainliest ❤

Answer 2

Answer:

Have you ever taken two different things and combined them to make something brand new? Maybe you have taken two or more completely different Lego sets and put all the pieces together and invented something. Maybe you have helped your parents cook in the kitchen and combined many different ingredients and came out with cookies. Yum!!

Scientists do this with elements in the periodic table to make new substances. They cannot just combine elements at random though. Elements are very picky about what they combine with. However, they give scientists a clue of what other element they might combine with. That clue is the element's number of valence electrons.