The monovalent radical that consists of two atoms is the hydride ion (H-). It has a single negative charge and is composed of two hydrogen atoms.
Antigen.
No, they are entirely two different things. What might stimulate a receptor could be an antigen.
Yes, T cell activation is antigen-specific. T cells recognize specific antigenic peptides presented by antigen-presenting cells through the T cell receptor (TCR). This interaction leads to T cell activation and the initiation of an immune response against the specific antigen.
Naive antigen-nonspecific T cells do not become activated since they lack the T cell receptor specificity for the particular antigen being presented. They do not respond to IL-2 secreted by the activated antigen-specific T cells and remain in a resting state until they encounter an antigen to which they are specific.
Sodium is monovalent, the cation is Na+. Chlorine is monovalent, the anion is Cl-.
Sodium chloride is a compound and hasn't valence; sodium and chlorine, as elements are monovalent,
The charge on a monovalent ion is +1, meaning it has lost one electron and carries a positive charge. Examples of monovalent ions include sodium (Na+) and chloride (Cl-).
Copper can exist in both monovalent (Cu+) and divalent (Cu2+) states, depending on the chemical conditions. In most common situations, copper tends to exist in its divalent form.
Lithium is only monovalent. Aluminium is trivalent; rarely is bivalent or divalent. Gold is monovalent or trivalent.
Monovalent metals are metals that can form ions with a charge of +1. Examples of monovalent metals include lithium (Li), sodium (Na), and potassium (K). These metals typically lose one electron to achieve a stable electron configuration.
Antigens.
yes
+1. Lithium is monovalent.
Na+ ions (monovalent +1)
Abwehrstoff or Antigen
A monovalent ion is an ion that carries a single positive or negative charge. This means it has either gained or lost one electron, resulting in an imbalance of positive or negative charge. Examples of monovalent cations include sodium (Na+) and potassium (K+), while chloride (Cl-) is a monovalent anion.