You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
chemistry help
- Thread starter czagara
- Start date
czagara said:Does anyone know where I can get chemistry help? Or do they do chemistry help on here?
I can help you !
If it's a pre-college question .
Take a look at this
http://chemistryhelpforum.com/chemistry-help/index.php
http://chemistryhelpforum.com/chemistry-help/index.php
JuicyBurger
Junior Member
- Joined
- Jan 26, 2010
- Messages
- 96
czagara said:basically i need to know you figure out hhow ow many valence electrons are in a compiund. For instance how many valence electrons are in H20.
Valence elctrons refer to the electrons that are in the outermost "shell". Oxygen has a total of 6 valence electrons, while Hydrogen only have 1 electron each.
\(\displaystyle 6 + 1 + 1 = 8\)
Hope this helps!
tutor_joel
Junior Member
- Joined
- Feb 6, 2010
- Messages
- 157
look at the periodic table and see what group the elements are in.
H is in Group IA and O is in Group VIA. That means 1 and 6 valance electrons respectively. You will notice that O has 8 total electrons because it's the 8th element. The first two are in the K shell in the s sub orbital. Any of this ringing a bell? Oxygen, 1s2 2s2 2p4 is another way of doing it. In each term, the first number is the shell, the letter is the sub-orbital, and the second number is the number of electrons. So the number of electrons in the valence shell (the outermost shell 2) is 6 for Oxygen
H is in Group IA and O is in Group VIA. That means 1 and 6 valance electrons respectively. You will notice that O has 8 total electrons because it's the 8th element. The first two are in the K shell in the s sub orbital. Any of this ringing a bell? Oxygen, 1s2 2s2 2p4 is another way of doing it. In each term, the first number is the shell, the letter is the sub-orbital, and the second number is the number of electrons. So the number of electrons in the valence shell (the outermost shell 2) is 6 for Oxygen