2原子の
an ion or radical derived from ammonia and by combination with a hydrogen ion or atom, called ammonium
a metallic element whose atomic number is 24, called chromium
an uncharged particle having a magnetic moment in the opposite direction of the neutron, called antineutron
a metallic element whose atomic number is 32, called germanium
the quantity of an element whose weight in grams is numerically equal to the atomic weight of the element
the thermal capacity per gram atom of any element, called atomic heat