Ap Chemistry help. First day of Ap chem?
ok so I answers this question im not sure if its right can someone check it for me?
11. An element filled with the first 3 energy levels filled, has 2 electrons in it's valence shell. identify the element.
i wrote down Fe, Because since every energy level is 8 and 3 energy levels are filled its 8x3=24 + 2 is 26. and 26 is the atomic number for Fe, then again i might be completely wrong.
this question i dont understand.
12. An isotope with a mass number of 80, has 45 neutrons in it's nucleus identify the isotope
at first i thought it was Rh since it has 45 neutrons but the i looked at 80 atomic mass and the closest one rounded to that was Br. so i dont know which one it is.
September 5, 2012
7 Comments • Newest first
[quote=Bob11111]Isn't this stuff regular high school chemistry? What's so AP about it?[/quote]
Yea it was review stuff. Like a reminder of what we did last year.
[quote=Bob11111]Isn't this stuff regular high school chemistry? What's so AP about it?[/quote]
I'm assuming first day is just review stuff.
Isn't this stuff regular high school chemistry? What's so AP about it?
[quote=Kazum]The first energy level is only filled with 2.[/quote]
thanks. I understand it i now
[quote=Chemo12]ohhh i get # 12, i just needed to subtract the mass # - the neutrons and get the protons! lol long summer.
i dont understand why 11 is Ca isent every energy lvl filled 8?[/quote]
The first energy level is only filled with 2.
[quote=LowWillpower]11. Should be Ca, since the first energy level is only 2 electrons. Second 2 are 8, leaving calcium with 2 electrons on it's shell with the 1st 3 full. Each energy level is is row in the table.
12. I wanna say bromine. If it has atomic weight of 80 and 45 neutrons, that leaves 35 protons, giving us Br, if my chem memory is good.[/quote]
ohhh i get # 12, i just needed to subtract the mass # - the neutrons and get the protons! lol long summer.
i dont understand why 11 is Ca isent every energy lvl filled 8?
11. Should be Ca, since the first energy level is only 2 electrons. Second 2 are 8, leaving calcium with 2 electrons on it's shell with the 1st 3 full. Each energy level is is row in the table.
12. I wanna say bromine. If it has atomic weight of 80 and 45 neutrons, that leaves 35 protons, giving us Br, if my chem memory is good.