Electron Configuration Shorthand?
Hydrogen H )1e-
Lithium Li )2e- )1e-
Fluorine F )2e- )7e-
Sodium Na )2e- )8e- )1e-
i don't really get this, how can you know what's next? i can't flung in chemistry!
Answer:
I am not certain however, this has to do with the different orbital levels the certain elements have according to their number of electrons (e-).
Thus, Hydrogen has 1 electron (e-) and therefore that one electron goes into the first orbital level; 1s.
I would guess in " long hand" it would go like this: H - (1s(supercript))1
The superscript 1 signifying the number of electrons.
Next, Lithium, Li has 3 electrons (e-). The first 1s orbital can only hold 2 electrons. When that level is filled, then the last electron goes into the next orbital level, 2s.
long hand = Li- (1s(superscript))2 (2s(superscript))1
Fluorine; has 9 electrons (e-). With this amount of electrons it fills the 1s, 2s and most of the 2p orbitals.
long hand = F-(1s(superscript))2 (2s(superscript))2 (2p(superscript))5
However, this is not exactly what you have in your example so
i assume that the "7 e-" is the 2s and 2p orbitals are combined, and not separated like in the "long hand" way
Sodium; has 11 electrons (e-). It fills the 1s, 2s, 2p, and part of the 3s orbitals.
long hand= Na - (1s(superscript))2 (2s(superscript))2 (2p(superscript))6 (3s(superscript))1
Again, the 2s and 2p orbitals are added together to make a total of 8 e-. With this orbital filled, it moves on to the next orbital, the 3s orbital.
Your next question... "...what's next?" Although your question is vague i am going to assume that you mean what is next element to write in shorthand. or something of that sort.
I am going to assume it is Chlorine. Then, maybe potassium. Then, Bromine. Excluding the inert gases or noble gases, the elements that were chosen were from alternating sides of the periodic table.
I hope that helps. Sorry for my confusing-ocity.
i dont know if this'll help,
for the first 20 elements the electron shell arrangements are 2,8,8,2.
Hydrogen had only one electron so its just 1
lithium i'm guessing has 3, but shell i only can contain 2 so it moves onto the next shell, so its 2,1
and i'm guessing sodium has 11 and the first shell can only hold 2 electrons so it moves onto the next one so its 2 and 9 left over but its 2,[8],8,2 and the second shell can only hold 8 so it takes 8 from that 9 left over and 1 is left. Shell 3 can hold 8 but it only needs one so you end up with
[2,8,1]
i think the - after the e mean the electron is negative because electrons have a negative charge.
not sure, havent learnt that in yr 9
hope it helps
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