The frequency of the radiation emitted by alkali metals in the flame test follows the order :

Question

The frequency of the radiation emitted by alkali metals in the flame test follows the order : (A) Li > Na > K > Cs (B) Li > K > Na > Cs (C) K > Na > Li > Cs (D) K > Cs > Na > Li

Tardigrade Admin · Accepted Answer

Alkali metals have very low ionisation energy. So, it will be very easy to eject an electron. Electrons are ejected from the surface of the metal when a radiation of suitable frequency is used in photoelectric effect.

Therefore, correct order of absorb frequency is

K > C s > N a > L i

Q. The frequency of the radiation emitted by alkali metals in the flame test follows the order :

$L i > N a > K > C s$

$L i > K > N a > C s$

$K > N a > L i > C s$

$K > C s > N a > L i$

Alkali metals have very low ionisation energy. So, it will be very easy to eject an electron. Electrons are ejected from the surface of the metal when a radiation of suitable frequency is used in photoelectric effect.

Therefore, correct order of absorb frequency is

$K > C s > N a > L i$

Q. The frequency of the radiation emitted by alkali metals in the flame test follows the order :

Li>Na>K>Cs

Li>K>Na>Cs

K>Na>Li>Cs

K>Cs>Na>Li

Alkali metals have very low ionisation energy. So, it will be very easy to eject an electron. Electrons are ejected from the surface of the metal when a radiation of suitable frequency is used in photoelectric effect. Therefore, correct order of absorb frequency is K>Cs>Na>Li

$L i > N a > K > C s$

$L i > K > N a > C s$

$K > N a > L i > C s$

$K > C s > N a > L i$

Alkali metals have very low ionisation energy. So, it will be very easy to eject an electron. Electrons are ejected from the surface of the metal when a radiation of suitable frequency is used in photoelectric effect.

Therefore, correct order of absorb frequency is

$K > C s > N a > L i$