Question

*not class specific*
How do you get the electron configuration for an element? Do you just count the # of electrons then put them in order of sub-levels?

Answer 1

example: \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\)

Answer 2

yea basically. You just have to remember certain filling orders. For example the 4s sub-level will fill before the 3d sublevel.

Answer 3

Filling orders.. are there any such things I can use to help memorize that? o:

Answer 4

Like is there a mnemonic or a little acronym...

Answer 5

Sorry was afk. Uhh I dont know of any mnemonics for learning filling orders. This is basically a general notation of how subshells fill
1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p 6s 4f 5d 6p 7s 5f 6d 7p

Answer 6

ignoring exponents

Answer 7

Ahh

Well I guess I could hardwire it into my memory lol

Answer 8

yes ,any problem ?

Answer 9

is above hahah

Answer 10

well i remembered the series upto 5p

Answer 11

1s 2s 2p 3s 3p 4s 3d 4p 5s 4d 5p

Answer 12

just memorise it

Answer 13

omg
mad genius o O o

Answer 14

;)

Answer 15

ok... what is isoelectronic mean exactly?

Answer 16

isoelectronic means same no of electrons

Answer 17

okay... how do I know if they have same #?
the question is "what is isoelectronic with Kr"

options:
Cl-
Br-
K+
Rb+
Kr4+

there is more than one answer

Answer 18

first tell me how many electrons are there in Kr?

Answer 19

uh...
is atom #?

Answer 20

element Kr consists how many electrons in it ?

Answer 21

says, 36

Answer 22

good

Answer 23

what about Cl- ?

Answer 24

answer is Br- and Rb+, but idk how they have same electrons...

Answer 25

yes they are correct

Answer 26

just answer me what i'm asking

Answer 27

how many electrons are there in Cl- ?

Answer 28

18.

Answer 29

correct ! +1 due to negative charge

Answer 30

hmm so 1 less e is + charge then?
1 less than normal e

Answer 31

yea

Answer 32

what about Br- ?

Answer 33

36

Answer 34

good

Answer 35

and K+ ?

Answer 36

ohh, I see now ...
uh, K+ has 20

Answer 37

nu

Answer 38

+ve charge is there,so subtract 1 electron from it

Answer 39

AHHHH
18

Answer 40

like if element has +x charge, subtract x electrons from it

and if element has -x charge,add x electrons to it

Answer 41

yea! 18 is correct

Answer 42

hahah oops

okay... Rb+ is 36 too :T
and Kr4+ is eh... 32

Answer 43

yea

Answer 44

GOOD JOB :D

Answer 45

ahhh I see now
YES ty ☺

Answer 46

my pleasure ☺☺☺☺☺☺

Answer 47

humm... and what is this question answer?
"which has electron configuration \(\large{[Ne]3s^{2}3p^{6}}\)?"

options are
S2-,
Cl,
Ar,
K+,
Ca2+

Answer 48

I know \(s\) sublevel have 2 e because one pair, and \(p\) sublevel have 5 pairs so 10 e

Answer 49

so this makes (outside of Neon) 2 electrons from the \(3s\) and 6 electrons out of 10 in \(3p\) orbital

Answer 50

chill chill
i'm here

Answer 51

kek
am trying to make less work for you... also I need to learn lol

Answer 52

first tell me how many electrons are there in Ne ?

Answer 53

10

Answer 54

good

Answer 55

18 electrons.

Answer 56

CLAPS

Answer 57

now find 18 electrons in your options

Answer 58

find which ion has 18 electrons

Answer 59

LOL

I don't know... they're Argon

☻

I MADE A JOKE

Answer 60

(argon neutral is 18 electrons... HAHAHAHAHA)

Answer 61

CORRECT , it is one of the options

Answer 62

WAI?

oh yeah it is LOL

Answer 63

XD

Answer 64

!!
\(Ca^{2+}\) is also 18 \(e^{-}\)

Answer 65

Yo

Answer 66

Aye ☺

Answer 67

find more lady

Answer 68

sulfur is 16, +2 is 18...
potassium is 19, +1 is 18

Answer 69

YAI

Answer 70

Yo

Answer 71

YOU'RE A GREAT LEARNER <3

Answer 72

AW TY ♥

Answer 73

♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥

Answer 74

next one is have diagram... -_-
I will do that one myself...
but it ask "where does elements form anions that are isoelectronic with a noble gas?" what is that??

Answer 75

by gaining electrons

Answer 76

yes ik anion is negative charge thus add electron lol

Answer 77

but isoelectronic with all noble gas... or with specific? like element A is isoelectronic with noble gas A?

Answer 78

well it comes from bonded elements
it is negative because it gained electrons from other element

Answer 79

\[\large{↑}\]

Answer 80

LOL kitti

Answer 81

\[\LARGE{☺}\]

Answer 82

*winks*

Answer 83

\[\LARGE{♥}\]

Answer 84

*whistles*

Answer 85

ehhh-
okk, lets get back to topic...

is isoelectronic mean like element A is same electron amount as noble gas A?

Answer 86

well that element has some charge on it like +ve charge or -ve charge

Answer 87

I think I get it... btw is left side, the metals in 1st two groups minus Hydrogen right?

Answer 88

lol what?

Answer 89

it's ok... I have this on my powerpoint

OK NEXT ONE,
"which of these ions has Lewis symbol like"