How many unpaired electrons in Se?

Answer 1

Ok if you look at the Periodic Table Se is in 3P4. So you know that P can hold up to 6 electrons. In your mind picture three boxes and each box holds two electrons, But since you have certain rules you must put the electrons across before you can pair them up. So 1 goes into box one, another in box two, another in box three, now that the three boxes have something inside you go back to the first box and place the last electron, Notice you have two electrons without a partner. SO THE ANSWER IS 2.

Also you can also think of a bus... when you walk into a bus everyone wants to grab a seat by themselves right? once the next group of kids come and there are no longer any single seats than they start to sit next to other kids. Its the same idea with electrons. they all want their own seats until there is no single seats left then they pair up

Answer 2

32

Answer 3

Two

Answer 4

2