一种放射性金属化学元素(符号Ac),原子序数为89；存在于铀矿中。
一种放射性金属化学元素(符号Ac),原子序数为89；存在于铀矿中。；锕；[化] 锕Ac
一种放射性金属化学元素(符号Ac),原子序数为89；存在于铀矿中。
A radioactive, metallic chemical element (symbol: Ac) with an atomic number of 89; found in uranium ores.
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