She gave him a miniature copy of the periodic table of elements.
她给了奥巴马一个元素周期表的微型复制品。
It is on the periodic table of elements under the symbol Bi at atomic number 83.
在元素周期表里序列号是83，标志是BI。
They support the 130-year-old idea of their countryman Dmitri Mendeleev (who created the first version of the periodic table of elements).
他们支持他们同胞门捷列夫(他创造了元素周期表的第一版)有130年历史的观点。
Early versions of the periodic table had gaps, missing elements.
早期的元素周期表有空缺，缺少一些元素。
Like the Periodic Table of the Elements, this system holds ample opportunity for mixing proportions, creating alloys, and adding impurities.
就像化学上的元素周期表，该系统拥有充足的机会来进行混合，创造合金，或添加混合物质。
Arsenic sits right beneath phosphorus in the periodic table of the elements and shares many of its chemical properties.
在元素周期表中，砷就位于磷的下面，二者具有很多相同的化学性质。
The new element, which has yet to be named, slips into a place on the periodic table between elements 116 and 118, both of which have already been discovered.
新元素目前尚未被命名，放入元素周期表的116号和118号元素之间的位置，这两者都已经被发现。
They're black with colored elements of the periodic table.
它们是黑色的,中间还有些元素周期表上的彩色元素。
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.
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。
And there's a lot we can explain by talking about what we see in the periodic table in terms of what different trends are in grouping different elements in different spots within the periodic table.
我们可以解释很多，通过讨论元素，周期表中的内容，按照各种不同的规律，将周期表中不同位置的元素分组归类。
In recent years, there have been several claims by laboratories for the discovery of new chemical elements at positions 113, 114, 115, 116 and 118 on the periodic table.
最近几年，有几个实验室声称自己在元素周期表的113,114,115,116和118位置上发现了新的元素。
Wolfram Periodic Table: Hailed by Stephen Fry as reason enough to splash out on an iPad, this wonderful app brings the Periodic Table of the Elements to glorious life.
Wolfram周期表：被StephenFry赞誉已经有充分的理由使其在iPad上流行了。这种强大的应用将元素周期表和精彩的现实生活联系起来。
Two new elements have been added to the periodic table after a three-year review by the governing bodies of chemistry and physics.
经过3年的研究，元素周期表上又增添了2种元素。
Since the 19th century, European and American discoveries have monopolized the naming of elements on the periodic table.
自19世纪以来，欧洲和美国的发现垄断了对周期表中元素的命名。
In 1869, Dmitri Ivanovich Mendeleev, a Russianchemist, published his periodic table of the elements.
俄国化学家门捷列夫在1869年公布了他的元素周期表。
One way is by using the periodic table of the elements. The periodic table neatly tabulates information about atoms.
方法之一是使用元素周期表。元素周期表把原子的信息整齐地列表。
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。
So, the vast majority of elements in the periodic table are metals.
所以，元素周期表中的大部分，都属于金属。
Dopants for silicon wafers are found in Groups III and V of the Periodic Table of the Elements.
晶圆片搀杂剂可以在元素周期表的III和V族元素中发现。
Researchers have now assessed the criticality of all 62 metallic-based elements on the Periodic Table to reveal which are most at risk and what that means for our gadgets in the long-term.
研究人员现已对元素周期表中的62种金属元素的临界状态进行了评估，列出了处于濒危状态的金属名单，并从长远角度分析了这些金属的储量能否满足人类制造小器具的需求。
Researchers have now assessed the criticality of all 62 metallic-based elements on the Periodic Table to reveal which are most at risk and what that means for our gadgets in the long-term.
研究人员现已对元素周期表中的62种金属元素的临界状态进行了评估，列出了处于濒危状态的金属名单，并从长远角度分析了这些金属的储量能否满足人类制造小器具的需求。
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