heptavalent

Having seven valences

Heptavalent describes an atom or element with a valence of seven—capable of forming seven chemical bonds or having an oxidation state of plus or minus seven.

The term appears in chemistry for elements like manganese in permanganate compounds.

In medicine, a heptavalent vaccine protects against seven strains of a pathogen.

vaccines

pneumococcal

Relating to lung-infecting bacteria

polyvalent · multivalent · booster · adjuvant · prophylaxis

valence

octet

Group of precisely eight

manganese · rhenium · technetium · permanganate · ionization · redox

chemistry

osmium

Densest stable element

  • rutheniumRare metallic element, number forty-four
  • iridiumElement seventy-seven
  • ligandMolecule that binds centrally

chelation · organometallic · actinide · lanthanide · spectroscopy

seven

septet

Seven-person musical group

Opposites
valence number

heptavalentmonovalent

Having valence of one

divalent · bivalent · trivalent · tetravalent · hexavalent

Family

heptagon, heptad, heptagonal, heptameter

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Used worldwide · Timeless · Abstract · Rated G