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Re: Chemistry; uh, sort of off-topic.

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Drakles is not online. Drakles
Joined: 19 Oct 2014
Total Posts: 1066
19 Aug 2015 01:41 PM
I'll compensate by helping those who need it; because this is the only forum I really post on.

So, I have chemistry homework, relating to the structure of an atom and what not. However, I'm having some complications. (note; I haven't exactly done chemistry, I just jumped the gun and took a long shot and though 'hey, why not try chemistry', little did I know, the teacher we have has decided to exclude those who have just started and resume where they last left off).

I thought the amount of electrons, was equal to the amount of protons... and the amount of protons is equal to the atomic number. Then the amount of neutrons is the atomic mass subtracted by the atomic number.

Lets take calcium for example (from my sheet).
> Has 20 protons.
> Has an atomic mass of 40.
> Has 18 electrons.

I have to find out the amount of neutrons, the electron management and the nuclide notation... but, it has 2 less electrons than protons. A friend of mine said the atom wouldn't 'survive' because it's unbalanced; and from my research, the electrons is always equal to the protons.

Is this a typo or something? Could someone give me a quick run down on this?

The greatest pleasure in life is doing something that people said you couldn't do.
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lordrambo is not online. lordrambo
Joined: 16 Jun 2009
Total Posts: 20628
19 Aug 2015 01:49 PM
protons = atomic number, which is indeed 20
electrons = atomic number - charge (which is plus 2), so yes 18
neutrons = atomic mass - prontons - electrons, so 2

so that means
[Ca]+2
with the -2 superscripted
the Calcium would have to bond to other calciums or it would have to bond to something with with a +2 charge

iirc
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Drakles is not online. Drakles
Joined: 19 Oct 2014
Total Posts: 1066
19 Aug 2015 01:50 PM
Where did you get the charge from?

The greatest pleasure in life is doing something that people said you couldn't do.
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Drakles is not online. Drakles
Joined: 19 Oct 2014
Total Posts: 1066
19 Aug 2015 01:53 PM
Protons - electrons?

The greatest pleasure in life is doing something that people said you couldn't do.
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lordrambo is not online. lordrambo
Joined: 16 Jun 2009
Total Posts: 20628
19 Aug 2015 01:56 PM
yeah, there are two more protons than electons so the ion is +2.
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TimeTicks is not online. TimeTicks
Joined: 27 Apr 2011
Total Posts: 27115
19 Aug 2015 01:57 PM
Just keep in mind that there are isotopes you have to account for when dealing with the atomic numbers.
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KoreanBBQ is not online. KoreanBBQ
Joined: 06 Mar 2015
Total Posts: 1436
19 Aug 2015 02:00 PM
isotopes man. if you remove an electron you have aan isotope, which isnt quite an element, that is unstable, those are not on the periodic table.


~TreeBranch, Owner of Lady of the Federation x2+ Crown of Roses
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lordrambo is not online. lordrambo
Joined: 16 Jun 2009
Total Posts: 20628
19 Aug 2015 02:04 PM
the other calcium is extremely rare and he probably isn't up to isotopes yet anyway
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Drakles is not online. Drakles
Joined: 19 Oct 2014
Total Posts: 1066
19 Aug 2015 02:06 PM
Ah! I think I got it now. Example of what I've done. (It's obviously much neater, because it's in a table, but; forum doesn't exactly allow that).

Nuclide Notation: 35/17 Cl (Chlorine) -- Neutral
Atomic Number: 17
Atomic Mass: 35
Protons: 17
Neutrons: 18
Electrons: 17
Electron Arrangement: 2, 8, 7

Nuclide Notation: 40/20 Ca+2 (Calcium) -- Positive Charge
Atomic Number: 20
Atomic Mass: 40
Protons: 20
Neutrons: 20
Electrons: 18
Electron Arrangement: 2, 8, 8



The greatest pleasure in life is doing something that people said you couldn't do.
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Casualist is not online. Casualist
Joined: 26 Jun 2014
Total Posts: 4443
19 Aug 2015 02:10 PM
@OP " little did I know, the teacher we have has decided to exclude those who have just started and resume where they last left off"

Not the teachers fault, you made the mistake of not taking the first class//doing your summer assignments.


That said, #protons correlate to specfic elements, #neutrons correlate to isotopes of an element, electrons vary (which allows electricity, the flow of electrons, to be a thing).

Generally speaking, the first two columns (Alkali and Alkalines) will usually give up electrons because They have 1 and 2 electrons respectively (when the total charge is zero-- #protons-#electrons==0) which are filling a new electron orbital.

**Note electrons like to repel each other, so you get electron shielding. This is where electrons and electrons orbitals repel each other, weakening the attraction protons have on electrons (this is why atoms can "lose" electrons).

You're going to have a bad time if you
A) blame the teacher
B) Use Roblox forums for scripters help.
Figure out what book they where using in the previous class and read up to where they left off, or drop the class.
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Drakles is not online. Drakles
Joined: 19 Oct 2014
Total Posts: 1066
19 Aug 2015 02:14 PM
I didn't see the value of chemistry for someone who wanted to pursue a career in mechanical engineering. Still don't, I've already inquired to drop the class for a class revolved around 3D modelling / graphics.

Nor was I blaming the teacher. Either way, thank you.

The greatest pleasure in life is doing something that people said you couldn't do.
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BluesteelBoyz is not online. BluesteelBoyz
Joined: 15 Feb 2012
Total Posts: 1841
19 Aug 2015 02:22 PM
All I know is there are 3 main parts and 1 unwanted part of a atom. xP

#cake
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TimeTicks is not online. TimeTicks
Joined: 27 Apr 2011
Total Posts: 27115
19 Aug 2015 02:32 PM
Funny thing, I'm majoring in Mechanical Engineering and I see all the value of Chemistry in ME. ME's around suppose to be well rounded in not just specific areas. There is certainly nothing wrong with studying up on Chem because of the fact that as a ME you should have to know alot about Chemicals when designing or creating anything ME related.
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BluesteelBoyz is not online. BluesteelBoyz
Joined: 15 Feb 2012
Total Posts: 1841
19 Aug 2015 02:38 PM
get out ^

#cake
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lostend is not online. lostend
Joined: 21 Aug 2011
Total Posts: 8265
19 Aug 2015 02:44 PM
^you get out and delete your garbage game
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BluesteelBoyz is not online. BluesteelBoyz
Joined: 15 Feb 2012
Total Posts: 1841
19 Aug 2015 02:45 PM
^ i am planning to when i make moneyzzz

#cake
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Drakles is not online. Drakles
Joined: 19 Oct 2014
Total Posts: 1066
19 Aug 2015 02:46 PM
@Time.

I'm more of the car / bike enthusiast; I'd be aiming towards that if anything.

The greatest pleasure in life is doing something that people said you couldn't do.
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BluesteelBoyz is not online. BluesteelBoyz
Joined: 15 Feb 2012
Total Posts: 1841
19 Aug 2015 02:55 PM
why r u in dis forum

#cake#cake
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Drakles is not online. Drakles
Joined: 19 Oct 2014
Total Posts: 1066
19 Aug 2015 02:59 PM
I was raised here!

The greatest pleasure in life is doing something that people said you couldn't do.
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CrowClaws is not online. CrowClaws
Joined: 04 Jul 2010
Total Posts: 4466
19 Aug 2015 03:00 PM
^^^
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Casualist is not online. Casualist
Joined: 26 Jun 2014
Total Posts: 4443
19 Aug 2015 03:05 PM
@OP I hope you do take the time to learn chem at some point, it can only ever be useful and there is little downside to investing a semester//year into learning chem. It's one of those things that's everywhere, even for biker/car enthusiasts (i.e. fuel composition during winter versus summer). And physics.
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Drakles is not online. Drakles
Joined: 19 Oct 2014
Total Posts: 1066
19 Aug 2015 03:45 PM
Don't get me wrong, chemistry is interesting, and the chances are I will take it up at some point... but, in my opinion; if someone who was hiring me (a garage or something), I have a feeling they'd be more incline to accept me if I had qualifications from something like design and manufacture, or graphics communication as opposed to chemistry. If anything, I'd do a bit of my 'own' chemistry (research, just theory stuff) at home I guess.

The greatest pleasure in life is doing something that people said you couldn't do.
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71428 is not online. 71428
Joined: 06 Aug 2015
Total Posts: 339
19 Aug 2015 04:00 PM
I down right hate chemistry. It's my weakest subject because it puts me to sleep. It doesn't help that every single chemistry teacher in existence has a stick up their spine or something. They are extremely unpleasant people.
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morash is not online. morash
Joined: 22 May 2010
Total Posts: 5834
19 Aug 2015 04:06 PM
"isotopes man. if you remove an electron you have aan isotope, which isnt quite an element, that is unstable, those are not on the periodic table."

If you remove an electron, you have an ion, specifically an cation since it has a positive charge. It's the same element, just with a positive charge. Ions and isotopes are both forms of an element. Isotopes and ions are not implicitly unstable or radioactive. Imagine for a seconds that all ionic bonds caused all atoms involved to become radioactive. Guess what? We would all be dead. Isotopes are just a form of the element that is expressed based on the number of neutrons. Every atom in the air you breathe is an isotope. Every atom in your body is an isotope. Isotopes are not on the standard periodic table because Carbon-11 is still Carbon.

"I down right hate chemistry. It's my weakest subject because it puts me to sleep. It doesn't help that every single chemistry teacher in existence has a stick up their spine or something. They are extremely unpleasant people."

Apparently all chemistry teachers are terrible.
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booing is not online. booing
Joined: 04 May 2009
Total Posts: 6594
19 Aug 2015 04:08 PM
Um, Ill be right back. Thought i clicked on script fourm.
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