原子序数

Lead has the highest atomic number of all the stable metals.

铅是所有稳定的化学元素中原子序数最高的。

The filter is constructed as a sandwich from three materials of different atomic number.

屏蔽物由不同原子序数的三种物质的夹层组成。

Besides, influence of atomic number on the numbers of residual bond and short-range order atom also was analysed.

同时，分析了原子序数对熔体中剩余键数和近程有序原子数的影响。

They have the same atomic number and hence nearly identical chemical behaviour but different atomic masses.

它们有相同的原子序数，因此化学行为几乎完全一样，但原子量不同。

Xenon is the element with the larger atomic number in inert gase , atomic radius is bigger.

氙是惰性气体中原子序数较大的元素，原子半径较大。

Also, the calcuated results on the angular distribution of backscattered electrons seem not to follow a cosine a cosine law for both the lower energies as well as the medium with larger mean atomic number.

入射电子能量较低，介质平均原子序数较大时，计算的背散射电子角分析不服从余弦分布律。

The main content is concerned with the following aspects:(1) It discusses the electric-optical effect in the theory about the interaction of γ-rays and materials, Compton effect and electron pair effect and the functional relationship between the three basic effects and γ-rays energy and atomic number, thus laying the foundation of dual energy γ-rays transmission method.

主要内容有如下几个方面：(1)讨论了γ射线与物质相互作用理论中的光电效应、康普顿效应和电子对效应，以及这三个基本效应与γ射线能量和物质的原子序数之间的函数关系等问题。由此构成了双能γ射线透射法的基础。

" Alkali metal:Any of the six chemical elements in the leftmost group of the periodic table (lithium, sodium, potassium, rubidium, cesium, and francium)."

碱金属：碱金属是元素周期表中的Ia族元素，按原子序数增加的顺序排列为︰锂、钠、钾、铷、铯和。

Sc, there are two kinds of isotopes shaped body, the structure is trigonal system and the hexagonal Department, is found in the periodic table predicted decades before the first one confirmed the correctness of the periodic table of elements, which is very famous.

周期表中ⅢB族有银白色金属光泽的固体金属过渡元素，又属稀土元素，原子序数Z＝21，原子量4959，化学符F号Sc，有两种同位素异形体，结构正方晶系和六角晶系，是周期表预言十年后才发现的第一个证实周期表正确性的元素，因而很有名气。

Thermal neutron radiography is a useful complementary tool of the other non-destructive testing methods for the hydrogenous materials and heavy metal subassembly,and thermal neutron tomography has not been developed in China.By the use of the CCD-based thermal neutron digital radiography facility in SPRR-300 reactor and the Al column sample with holes,the projecting data of 36 multiplied 552 groups are collected.

热中子照相技术在检测含氢材料、重金属组件结构、原子序数相近的不同元素、放射性材料等方面弥补了X光等其他无损检测技术的不足，广泛用于重金属组件、火工品等武器部件的质量检测和库存武器可靠性和有效性评估中。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。