chemical elements required in minute quantities for the normal growth and development of living organisms

Any of a group of 17 chemical elements with very similar properties, including the lanthanide series plus scandium and yttrium; also called [[稀土金属|稀土金屬|xi1 tu3 jin1 shu3]]

chemical element; any of the basic substances that cannot be broken down into simpler substances by ordinary chemical methods

Chemical elements that occur very infrequently in nature and are widely scattered; includes rare gases and elements such as selenium and tellurium, while the majority of others are rare metals

an element with a high atomic weight

(chemistry) any chemical element with a low atomic weight

the actinide series of chemical elements, including the fifteen metallic elements from atomic number 89 to 103

lanthanide; the series of fifteen chemical elements from lanthanum to lutetium on the periodic table

a chemical substance consisting of only one element in its elemental state

something containing multiple elements; multielement

any of the metallic elements in the central block of the periodic table, including the transition metals

any of the metallic elements occupying the central block of the periodic table, including those with partially filled d or f shells

A chemical element that is added to a metal to change its properties and create an alloy.

A chemical element that has a metallic luster, is malleable and ductile, and can conduct heat and electricity; except for mercury, they are solid at room temperature.

the periodic table of the chemical elements

An element composed of radioactive isotopes that can spontaneously emit radiation, such as radium, uranium, or thorium.