Question

The electron arrangement of

Answer 1

ion is 2.8.If atom X has 12 neutrons,what is the nucleon number for atom X?

Answer 2

A 22
B 23
C 24
D 25

Answer 3

My answer is B

Answer 4

2+8+1+12=23

Answer 5

Is my answer correct?

Answer 6

@UnkleRhaukus

Answer 7

What does it mean "ion is 2.8" ?

Answer 8

"2.8" what?, what units?

Answer 9

it's the electron arrangement

Answer 10

as in: 2 electrons in the innermost shell, and 8 in the next innermost shell?

Answer 11

the number of neutrons
n: 12

the number of electrons
e: 2+8 = 10

the charge of the species
q: p-e = 1

the number of protons
p: 1+e = 1+10 = 11

the total number of nucleons
A: n+p = 12+11 = 23

Answer 12

thnx @UnkleRhaukus :)

Answer 13

aluminium