T-dependent response

Recognition of protein antigens and requires the participation of CD4 helper T cells

TLS Online TPP Program

#Id: 7745

#Section 2: General Biology

The noble gases are left out of the trends in atomic radii because there is great debate over the experimental values of their atomic radii.

The SI units for measuring atomic radii are the nanometer (nm) and the picometer (pm). 1 nm = 1 X 109 m; 1 pm = 1 X 10-12 m.

TLS Online TPP Program

#Id: 7744

#Section 2: General Biology

An ionic radius is one-half the distance between the nuclei of two ions in an ionic bond.

TLS Online TPP Program

#Id: 7743

#Section 2: General Biology

A covalent radius is one-half the distance between the nuclei of two identical atoms.

TLS Online TPP Program

#Id: 7742

#Section 2: General Biology

Atomic radii: The atomic radii of an atom depends on its position in the periodic table.

We can never determine the atomic radius of an atom because there is never a zero probability of finding an electron, and thus never a distinct boundary to the atom.

All that we can measure is the distance between two nuclei (internuclear distance).

TLS Online TPP Program

#Id: 7741

#Section 2: General Biology

Atomic radii: The atomic radii of an atom depends on its position in the periodic table.

We can never determine the atomic radius of an atom because there is never a zero probability of finding an electron, and thus never a distinct boundary to the atom.

All that we can measure is the distance between two nuclei (internuclear distance).

TLS Online TPP Program

#Id: 7739

#Section 2: General Biology

Atoms are characterised by:

Radius

Ionization energy

Electron affinity

Electronegativity

Metallic character

Oxidation potential