The photosensitive pigment in the rods is called rhodopsin (visual purple).

TLS Online TPP Program

#Id: 7749

#Unit 1. Molecules and their Interaction Relevant to Biology

    

TLS Online TPP Program

#Id: 7750

#Unit 1. Molecules and their Interaction Relevant to Biology

The greater the effective nuclear charge the more tightly an electron is held in by the nucleus because there is less electron shield between the valence electrons and the nucleus, and so, the smaller the radius.

TLS Online TPP Program

#Id: 7751

#Unit 1. Molecules and their Interaction Relevant to Biology

Ranks the following in increasing atomic radius

S, Mg, Al

S: 16-10 +6

Mg: 12-10 = +2

Al: 13-10 +3

So: S < AlMg

TLS Online TPP Program

#Id: 7752

#Unit 1. Molecules and their Interaction Relevant to Biology

Electron affinity: The enthalpy change that results from adding an electron to a gaseous atom.

Electron affinity is becoming less negative (less exothermic) and less likely to gain an electron. 

TLS Online TPP Program

#Id: 7753

#Unit 1. Molecules and their Interaction Relevant to Biology

Electron affinity: The enthalpy change that results from adding an electron to a gaseous atom.

Electron affinity is becoming less negative (less exothermic) and less likely to gain an electron. 

TLS Online TPP Program

#Id: 7754

#Unit 1. Molecules and their Interaction Relevant to Biology

Linus Pauling was the original scientist to describe the phenomena Binal scientist t ES of electronegativity