Question

All the actinoids, atomic number 89 through 103 have seven electron orbits.

1. True
2. False

Answer 1

True

Step-by-step explanation:

We are given that all actinoids

General configuration of actinoids series

`[Rn]5f^(1-14)6d^(0-1)7s^2`

Actinoids element are

Ac=89=
`[Rn]6d^17s^2`

Th=
`90=[Rn]6d^27s^2`

`Pa=91=[Rn]5f^26d^17s^2`

`U=92=[Rn]5f^36d^17s^2`

`Np=93=[Rn}5f^46d^17s^2`

`Pu=94=[Rn]5f^67s^2`

`Am=95=[Rn]5f^77s^2`

`Cm=96[Rn]5f^76d^17s^2`

`Bk=97=[Rn]5f^97s^2`

`Cf=98=[Rn]5f^(10)7s^2`

`Es=99=[Rn]5f^(11)7s^2`

`Fm=100=[Rn]5f^(12)7s^2`

`Md=101=[Rn]5f^(13)7s^2`

`No=102=[Rn]5f^(14)7s^2`

`Lr=103=[Rn]5f^(14)7s^27p^1`

We can see that period of actinoid series =7

Electron orbit=period=7

Hence,the statement is true.