An effect first observed in one of these elements sees an increasing applied magnetic field cause oscillations in magnetic moment; that is the de Haas-van Alphen effect.
An effect first observed in one of these elements sees an increasing applied magnetic field cause oscillations in magnetic moment; that is the de Haas-van Alphen effect. It doesn't include selenium, but compounds containing iron and one of these elements often form high-temperature superconductors. The 209-isotope of one member of this group was found to have half-life a billion times longer than the age of the universe, confirming that an element that isn't part of it, lead, is indeed the heaviest stable element. The strongest known superacid contains a metalloid in this family. The lower elements in this group have +3 oxidation states if they lose all of their p shell electrons. For 10 points, what group of the periodic table consists of bismuth, antimony, arsenic, phosphorus, and nitrogen?
An effect first observed in one of these elements sees an increasing applied magnetic field cause oscillations in magnetic moment; that is the de Haas-van Alphen effect.
pnictogens [also accept Group 15, Group VA, or Group VB (pronounced "5A/B"), accept nitrogen group before it is said at the end of the tossup, accept answers with synonyms for group like family]