Question

show the distribution of electron in different energy cells of element with atomic number 1 to 20 write symbol and valency of element also​

Answer 1

Answer:

By now, we know that, in an atom, electrons revolve around the nucleus while protons and neutrons are inside the nucleus. The question is, how do electrons revolve? Do they move randomly? Or do they follow a specific route? How are they arranged? The answer to these questions is Electronic Configuration. Let’s learn about the arrangement of electrons around the nucleus.