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atomic number 【化學】原子序數。

“ nitrogen : gaseous chemical element , chemical symbol n , atomic number 7 . a colourless , odourless , tasteless gas , it makes up 78 % of earth ' s atmosphere and is a constituent of all living matter . 氮:氣態化學元素,化學符號n ,原子序數7 。無色、無臭、無味的氣體,占地球大氣的78 % ,也是所有生物體的組成部分。

atomic pile

On the basis of overall confirming the reasonableness of available method for calculating migrated component amount , the author has further improved the true constant component fixed calculation method proposed by the author in 2000 , i . e , the calculation of actual true migrated mass and atomic number of metasomatically atered rocks , by using two method of measuring rock density 摘要文章在全面論證已有組分遷移量計算法合理性的基礎上,進一步完善了筆者2000年提出的真恒量組分恒定計算法,即:利用巖石的兩種實測密度計算交代蝕變巖的實有真遷移質量及其原子數。

In this paper , such three points are studied as : a ) the angular distributions of the hot electrons emission under laser irradiation at different incidence angles and at different polarization direction , the angular distribution of the hot electrons in the different energy range , and the effects of laser prepulse on the angular distributions of the hot electrons emission ; b ) the energy distribution of the hot electrons at different directions , from the metallic targets and the dielectric targets , in the different energy range of the hot electrons , and the effects of the atomic number z on the energy distribution of hot electron generated by the metallic targets ; and c ) the energetic proton emission resulting from the interaction of the us - ui laser pulse with plasma 本論文進行了三個方面的研究:第一,超熱電子角分布的研究,包括不同激光入射角下超熱電子的角分布;激光不同偏振態下超熱電子的角分布;激光預脈沖對超熱電子角分布的影響;不同能段的超熱電子的角分布。第二,超熱電子能量分布的研究,包括不同方位超熱電子的能量分布,金屬與非金屬靶材的超熱電子的能量分布,金屬原子序數z對超熱電子能量分布的影響以及不同能段超熱電子的能量分布。第三,研究了超短超強激光與固體靶相互作用所產四川大學博士學位論文生的高能質子發射和能譜。

The test results show that : 1 . under giving conditions , two explosives with the same atomic number ratio have similar combustion performances , 2 . the pressed charge and the powder charge shows observably different combustion characteristics , 3 . within 211 . 7 m - 635 . 0 m , decreasing the grain size may enhance combustion velocity 通過對測試結果的分析表明,在特定條件下具有相同原子組成比例的炸藥,其燃燒性能相近;同種炸藥的藥柱和藥粉燃燒性能差異較大;在211 . 7 635 . 0 m范圍內, hmx 、 rdx顆粒越細,燃燒越快。

1 lanthanide hydrides ( m = la , nd , sm , dy and yb ) can be prepared easily by the direct hydrogenation of lanthanide metals catalyzed by ticl4 in tetrahydrofunan ( thf ) under normal pressure . the rate of hydrogenation decreased with increasing atomic number of lanthanides . transmission electron micrographs showed that the resulted lanthanide hydrides were in the form of nanoparticles with an average primary particle size around 20 - 40 nm 本論文首次提出一種在溫和條件下催化合成納米尺寸的鑭系金屬氫化物的方法,介紹在常溫常壓下,鑭、釹、釤、鏑、鐿五種鑭系金屬在四氫呋喃( thf )溶劑中,催化劑作用下與氫氣直接化合形成相應的納米尺寸的鑭系金屬氫化物。

Cdse , a ii - vi compound with direct transition , wide - band - gap and high atomic number ( 48 , 34 ) , is regarded as a new effective materials for room temperature nuclear radiation detectors and photoconductive devices , and can be used in many fields Prince提出的優良室溫核輻射探測器材料必須具備的要求,因而被認為是制備室溫核輻射探測器的最有前途的新材料之一,可廣泛應用于探礦、無損檢測、核醫學、環境監測、軍事和空間宇航技術等領域。

The optical limiting properties of the materials are investigated by using nanosecond laser pulses . we find that skeleton atoms and terminal ligands with larger atomic number can improve the optical limiting power of clusters with the same structure via heavy - atom effect 研究了團簇材料的光學限幅特性,發現對于相同的結構的團簇,骨架上的原子序數較大的金屬原子或終端配位體能通過重原子效應有效提高光限幅能力。

Where a is the mass number equal to the numbers of protons plus the number of neutrons in the nucleus , z is the atomic number equal to the number of protons in the nucleus , x is the chemical symbol of the atom 表示, a是質量數,是原子核內的質子及中子數目總和。 z是原子序數,等于質子的數目。 x是原子的化學符號。

“ nitrogen : gaseous chemical element , chemical symbol n , atomic number 7 . a colourless , odourless , tasteless gas , it makes up 78 % of earth ' s atmosphere and is a constituent of all living matter . 氮:氣態化學元素,化學符號n ,原子序數7 。無色、無臭、無味的氣體,占地球大氣的78 % ,也是所有生物體的組成部分。

The cosmic rays are mainly made up of high energy photons , plus some helium nuclei and heavy charged particles and ions , with atomic number equal to or greater than 3 宇宙射線的主要成份是高能量的質子,其次是氦原子核及少量原子序數3或以上的重粒子和離子。

As they are positively charged , their motion will be affected by an electromagnetic field . in general , heavy atoms ( having atomic numbers greater than 82 ) would tend to emit 在自然界內大部份的重元素(原子序數為82或以上)都會在衰變時釋放它,例如鈾和鐳。

The cosmic rays are mainly made up of high energy protons , plus some helium nuclei and heavy charged particles and ions , with atomic number equal to or greater than 3 宇宙射線的主要成份是高能量的質子,其次是氦原子核及少量原子序數3或以上的重粒子和離子。

As they are positively charged , their motion will be affected by an electromagnetic field . in general , heavy atoms having atomic numbers greater than 82 would tend to emit 在自然界內大部份的重元素原子序數為82或以上都會在衰變時釋放它,例如鈾和鐳。

As annotation , an equation of the relation between neutrons and protons in nuclei and its periodical solutions as well as atomic number limit are discussed 作為詮釋,探討了原子核內中子與質子的趨勢關系方程,以及其周期解和原子序數極限值。

Rare earth elements ( rees ) consist of lanthanide series with atomic numbers from 57 to 71 , as well as scandium ( atomic number 21 ) and yttrium ( atomic number 39 ) 稀土是指原子序數從57到71的鑭系元素以及與其同族的鈧和釔,共有17個元素。

However , you also want to include the name , symbol , atomic number , and atomic weight ; you can select each of these by using an 不過,我們還希望填充一些元素名、元素符號、元素號和原子量,可以在模板中使用

Polonium is a chemical element with the symbol po and atomic number 84 . it is a silvery white metal 釙polonium是一種化學元素,它的符號是po ,原子序數為84 ,它是呈銀白色的金屬。

Any of two or more kinds of atoms having the same atomic mass but different atomic numbers 同量異位素兩種或各多種有相同原子質量但卻有不同的原子序數的原子中的任一種

A type of atom specified by its atomic number , atomic mass , and energy state , such as carbon14 核種由它的原子序數、原子量和能量狀況具體確定的一種原子,如碳14