The ions X_- and Y₊ are isoelectronic, each containing a total of 10 electrons.
How many protons are in the nuclei of the neutral atoms of X and Y respectively?

Chimemeria

9 years ago

my school....it's 11 and 9 not 9 and 11 pls

fagaz

11 years ago

I dnt tink diz z coret..cuz - means gainin of electron wy + z loss of electron...d ans shud b 11 n 9

CaptainI.Musa

3 years ago

X and Y are having 10 electrons.
now
X- : is anion /non metal ,it has gain electron
Y+ : is cation /metal , it has lost an electron

so when X- having 10 electron & gain 1electron it is 10+1 =11e
y+ having 10 & lost an electroni it is 10-1 =9 e.


but the question ask of PROTONS .

so the number of proton is 10 & 10.
since element only lost an electron not a proton

correct option is A

had it been they ask of electrons, then
the correct option should be C 11 & 9

samuel8816

3 years ago

11 and 9 my school

Ay17

7 years ago

Guys read the question well, it says how many protons and not electrons. Myschool is absolutely correct

CRIMHAZ

3 years ago

My school d ans is
C

ShadrachAyandookun

2 years ago

D is correct