碳在化学元素周期表中排第六位。
Carbon occupies the sixth place in the periodic table of chemical elements.
请大家拿出一张纸，默写化学元素周期表。
Everybody please take out a piece of paper and write the periodic table from memory.
据英国广播公司报道，两种新元素被列入化学元素周期表中。
Two new elements have been added to the periodic table, BBC reported.
在测试中你们可以使用，化学元素周期表的官方版本，你们应该大部分都有了吧。
You are allowed to use on the test the official version of the Periodic Table of the Elements which most of you should have by now.
提要稀土是化学元素周期表中的镧系元素和化学性质相似的钇、钪共17种元素的统称。
ABSTRACT Rare earth is a collective name for 17 elements including ytterbium (Yb), scandium (Sc), and lanthanide series.
在太阳和行星形成之前，所有元素周期表上的化学元素在太阳系的原始尘埃中四处漂浮着。
Before the formation of the sun and planets, all the chemical elements found on the periodic table were floating around in the primordial dust of the Solar System.
在太阳和行星形成之前，所有元素周期表上的化学元素在太阳系的原始尘埃中四处漂浮着。
Before the formation of the sun and planets, all the chemical elements found on the periodic table were floating around in the primordial dust of the Solar System.
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