wiz-icon
MyQuestionIcon
MyQuestionIcon
4
You visited us 4 times! Enjoying our articles? Unlock Full Access!
Question

The first two orbits of an atom are completely filled with electrons and no electron is there in the third shell. The atomic number of the element is ________.


A
18
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
2
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
10
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
32
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is C 10
- Maximum number of electrons that a shell can accommodate is given by 2n2. The table given below shows the maximum number of electrons present in first three in shells.ShellShell number, nMaximum number of electronsK 12L28M318 - As the first two shells are completely filled the number of electrons present in the element is 10.
- The atomic number of a neutral element = number of protons = number of electrons present in the orbits
- Hence, the atomic number of the element is 10.

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Electronic Configuration
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon