Home
Class 11
CHEMISTRY
An atom has the electronic configuration...

An atom has the electronic configuration of `1s^2, 2s^2 2p^6, 3s^2 3p^6 3d^10 , 4s^2 4p^5`. Its atomic weight is 80.its atomic number and the number of neutrons in its nucleus shall be

A

35 and 45

B

45 and 35

C

40 and 40

D

30 and 50

Text Solution

Verified by Experts

The correct Answer is:
A
`""_(35)Br^(80)=1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(5)`
A = 80, Z = 35, N = ?
`N=A-Z=80-35=45`
Atomic number (Proton) is 35 and no. of neutron is 45.
Promotional Banner

Similar Questions

Explore conceptually related problems

A metal having electronic configuration 1s^(2), 2s^(2)2p^(6), 3s^(2)3p^(6)3d^(10), 4s^(2) is in

An element has the electronic configuration 1s^2 , 2s^2 2p^6 , 3s^2 3p^2 Its valency electrons are

An atom has electronic configuration 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3P^(6) 3d^(3) 4s^(2) . In which group wouold it be placed ?

The element with electron configuration 1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^(10)4s^(2)4p^(5) belongs to

The electronic configuration: 1s^(2),2s^(2)2p^(6),3s^(2)3p^(6),3d^(10),4s^(2)4p^(6)4d^(10),5s^(2) is for:

The electronic configuration of an element is 1s^2 1s^2 2p^6 3s^2 3p^6 3d^(10) 4s^2 4p^3 . Its properties would be similar to which of the following elements?

An element having electronic configuration is 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3P^(6) 4s^(1) will form: