emmynimmy
  • emmynimmy
Given that oxygen has an atomic number of 8, determine how many protons and neutrons are in the isotope 18O, or oxygen-18.
Chemistry
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Photon336
  • Photon336
@emmynimmy what do you think the answer is
Photon336
  • Photon336
okay so i'll show you how to do it step by step if you're willing to actively participate
Photon336
  • Photon336
|dw:1443668072504:dw|

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anonymous
  • anonymous
K
anonymous
  • anonymous
I get that
Photon336
  • Photon336
@emmynimmy so far follow?
anonymous
  • anonymous
yes
emmynimmy
  • emmynimmy
Yeah I understand.
Photon336
  • Photon336
ok now for every element we have two numbers: the atomic number and the mass number. usually for every element the number of protons = the number of electrons. so positive charges = negative charges which makes it neutral. |dw:1443668234799:dw|
emmynimmy
  • emmynimmy
yeah I understood that
anonymous
  • anonymous
That makes sense, so positive cancels negative got it
Photon336
  • Photon336
okay great @8054manofwar and @emmynimmy next thing
Photon336
  • Photon336
what we need to do is for oxygen 18.
Photon336
  • Photon336
|dw:1443668415142:dw| can you guys tell me how many protons and electrons are in oxygen based off of what i said? @emmynimmy @8054manofwar
Photon336
  • Photon336
and also how do you know this?
anonymous
  • anonymous
there are 8 p+ and 8 e- right?
emmynimmy
  • emmynimmy
I knew that protons and neutrons equaled. I think that the number is 8protons and 10 neutrons
Photon336
  • Photon336
@8054manofwar @emmynimmy yep you guys got it and last thing
emmynimmy
  • emmynimmy
wait so was my answer correct?
anonymous
  • anonymous
Did you use the ask the (MAN) formula
Photon336
  • Photon336
to find the number of neutrons, you ALWAYS subtract the top number from the bottom that is the mass number from the atomic number. |dw:1443668631307:dw| so this element has 8 protons, 8 electrons and 10 neutrons. @emmynimmy @8054manofwar
Photon336
  • Photon336
do you guys know about cations and anions?
emmynimmy
  • emmynimmy
awesome! Thank you so much!
anonymous
  • anonymous
yes I do
emmynimmy
  • emmynimmy
sorry guys i know this isn't a chem question but i was wondering how can i post another question I have?
Photon336
  • Photon336
ok well what about this SAY if I had fluorine with a minus charge how many protons and electrons does this have? |dw:1443668752177:dw|
Photon336
  • Photon336
@emmynimmy you can post it here or open up another question
emmynimmy
  • emmynimmy
how do i open another question?
Photon336
  • Photon336
well you would have to close this question
emmynimmy
  • emmynimmy
oh ill just ask you guys then! So I don't know this, the question is If an atom of hydrogen loses its electron, what is its charge?
anonymous
  • anonymous
17 p+ and 18 e-
anonymous
  • anonymous
Its charge would be positive I think
emmynimmy
  • emmynimmy
+2 –1 +1 0
emmynimmy
  • emmynimmy
thats the answer choices.
Photon336
  • Photon336
@8054manofwar yeah your correct @emmynimmy okay for this, lets look at this
Photon336
  • Photon336
@emmynimmy where is hydrogen located? first of all on the periodic table? and what is it's atomic number?
emmynimmy
  • emmynimmy
atomic number is 1
Photon336
  • Photon336
can you tell me what this means in terms of how many electrons and protons @emmynimmy what about you @8054manofwar
anonymous
  • anonymous
It has 1 p+ and 1 e- and then 0 neutrons right
emmynimmy
  • emmynimmy
yeah what they said ^^ sorry i was typing.
Photon336
  • Photon336
@emmynimmy do you agree with @8054manofwar why is he right so far?
emmynimmy
  • emmynimmy
yes
Photon336
  • Photon336
but why?
emmynimmy
  • emmynimmy
Idk i read it.
Photon336
  • Photon336
so how many protons and electrons does hydrogen have @emmynimmy
emmynimmy
  • emmynimmy
one
Photon336
  • Photon336
ok so if hydrogen loses it's electrons what is it's charge now?
emmynimmy
  • emmynimmy
0
Photon336
  • Photon336
no
emmynimmy
  • emmynimmy
oh 1
anonymous
  • anonymous
Wait I know the answer emmy. Use the MAN formula
emmynimmy
  • emmynimmy
because there is one proton
emmynimmy
  • emmynimmy
right?
Photon336
  • Photon336
so the first thing you do is this, you write out how many protons and electrons hydrogen has |dw:1443669221490:dw|
anonymous
  • anonymous
YEAH!!!
anonymous
  • anonymous
Mann- Atomic Number=Neutrons
Photon336
  • Photon336
@emmynimmy the number of protons is always equal to the number of electrons. right it out like this protons have a positive charge + electrons have a negative charge - follow?
emmynimmy
  • emmynimmy
yes
emmynimmy
  • emmynimmy
so would it be 1+?
Photon336
  • Photon336
yes can you tell me why though? by writing it out
emmynimmy
  • emmynimmy
because there is still a proton.
Photon336
  • Photon336
exactly,
emmynimmy
  • emmynimmy
awesome thank you both so much you guys are awesome!
anonymous
  • anonymous
Tank u
Photon336
  • Photon336
yeah no problem take care
anonymous
  • anonymous
See u later guys
Photon336
  • Photon336
last thing though Cation's and Anions, the number of electrons changes

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