Question

Q: 3s23p5 and T: 4d105s25p5 in the same period

Answer 1

False

Step-by-step explanation:

Electronic configuration is the short representation of the structure of an atom.

Atomic number = number of electrons = number of protons.

Example

Atomic number of phosphorus is 15 so it has 15 electrons. The electronic configuration of Phosphorus is given as
`1s^2  2s^2 2p^6 3s^2 3p^3`

Here the superscript number represents the electrons 2 + 2 + 6 + 2 + 3 = 15 Electrons of Phosphorus.

The elements present in the same group will have same number of valence electrons (outer shell electrons)

For example

Fluorine,Chlorine,Bromine are all present in the same Group

The electronic configuration are

`F-9\Rightarrow 1s^2 2s^2 2p^5\\\\Cl-17\Rightarrow 1s^2 2s^2 2p^6 3s^2 3p^5\\\\Br-35\Rightarrow 1s^2 2s^2 2P^6 3s^2 3p^6 4s^2 3d^10 4p^5`

The elements present in the same period will have same number of shells

For example

Sodium, Magnesium, Aluminium, silicon, Phosphorus, sulfur, chlorine, Argon

All these elements are present in the same 3rd period and the number of shells = 3

The electronic configurations are

`Na-11\Rightarrow 1s^2 2s^2 2p^6 3s^1\\\\Mg-12\Rightarrow 1s^2 2s^2 2p^6 3s^2\\\\Al-13\Rightarrow 1s^2 2s^2 2p^6 3s^2 3p^1\\\\Si-14\Rightarrow 1s^2 2s^2 2p^6 3s^2 3p^2  \\\\Cl-17\Rightarrow 1s^2 2s^2 2p^6 3s^2 3p^5\\\\Ar-18\Rightarrow  1s^2 2s^2 2p^6 3s^2 3p^6`