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anonymous
 one year ago
Please help!
1. How many valence electrons are in the outermost energy level of each of the following elements?
a. Helium
b. Lithium
c. Nitrogen
d. Magnesium
I listed them as letters to make it easier to understand...
anonymous
 one year ago
Please help! 1. How many valence electrons are in the outermost energy level of each of the following elements? a. Helium b. Lithium c. Nitrogen d. Magnesium I listed them as letters to make it easier to understand...

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Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Do you know how to write electronic configurations?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0?electronic configurations?

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Yes, like for helium (atomic number 2) we write \(\sf 1s^2\)

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1For nitrogen (atomic number 7) we write \(\sf 1s^2 2s^2 2p^3\)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0nope... no clue, sorry I am literally so stupid when it comes to all this electron atom stuff.

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Then how will you solve this?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I am trying to understand it, so let me think out loud here

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0would you solve it like an equation? @Abhisar

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Good, I may teach you a short trick but it may not be always correct but you will just do fine for school level.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok... I will start with helium. 1s^2. first would you find the square root of 1s?

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1No it's not square (: It means there are 2 electrons in 1s orbital.

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Leave it, just remember the sequence 2, 8, 8, 18

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Now, if i say you to write the configuration of nitrogen (atomic no 7). You will write 2, 5 (Why five? because the sum has to be 7)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ok I am following you

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1So, if i say write for lithium (atomic no. 3), how will ya do?

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Remember the series. It's 2, 8, 8, 18

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1See the series, 2, 8, 8, 18 So will write first 2, now we need 10 more. So next we write 2, 8, now we need 2 more so finally we write 2, 8, 2. Got it now?

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Finally write for hydrogen

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0wouldnt it just be 2?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so I have the numbers: a. Helium 2 b. Lithium2,1 c. Nitrogen2,5 d. Magnesium2,8,2

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Well done! Now we know that electronic configurations for the given elements are as following a. Helium = 2 b. Lithium = 2, 1 c. Nitrogen = 2,5 d. Magnesium = 2,8,2 How to calculate valence electron now??? The last number in each of them represents the valence electrons. So for nitrogen, number of valence electrons will be 2.

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Can you tell me the number of valence electrons for the rest?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0if it's the last number, wait what is that referring to ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what placement is it referring to?

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1I am not able to understand ur question..

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what do you mean by "The last number in each of them represents the valence electrons." ^^^^^^^^^^^^

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0yes but you said that 2 was nitrogen's number, but wouldnt it be 5?

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1When did I say that? Yes, nitrogen has 5 valence electrons.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0XD "The last number in each of them represents the valence electrons. So for nitrogen, number of valence electrons will be 2."

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Last is 5 :( See, what we wrote for Nitrogen. (2, 5). 2 is first and 5 is last. Getting it?

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1Oh, sorry that was a typo :D

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I see! so the numbers would be: a. Helium = 2 b. Lithium = 1 c. Nitrogen = 5 d. Magnesium = 2

Abhisar
 one year ago
Best ResponseYou've already chosen the best response.1\(\color{blue}{\text{Originally Posted by}}\) @Abhisar Well done! Now we know that electronic configurations for the given elements are as following a. Helium = 2 b. Lithium = 2, 1 c. Nitrogen = 2,5 d. Magnesium = 2,8,2 How to calculate valence electron now??? The last number in each of them represents the valence electrons. So for nitrogen, number of valence electrons will be 5. \(\color{blue}{\text{End of Quote}}\)
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