问题描述：
the atoms of given element
是一个原子的已知的成分吗!
.
.
.
the atoms of a given element are identical to each other,and have the same mass and chemical properties.
是一个原子的已知的成分吗!
.
.
.
the atoms of a given element are identical to each other,and have the same mass and chemical properties.
问题解答：
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