单词	periodic table
释义	periodic tableˌperiodic ˈtable noun Examples EXAMPLES FROM THE CORPUS Carbon is the smallest atom in the fourth column of the periodic table of elements. For example, the natural arrangement of the chemical elements in Mendeleyev's periodic table has groups of traits reappearing cyclically. Helium, the next element in the periodic table, contains two electrons encircling a nucleus containing two protons. I got the periodic table off by heart. The chemistry of Mars and Venus was as balanced as the periodic table, and as dead. The chemistry of the Earth was out of kilter, wholly unbalanced by the periodic table, and alive. the periodic table a list of elements (=simple chemical substances) arranged according to their atomic structure
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