Nghĩa của từ samarium bằng Tiếng Anh

noun
1
the chemical element of atomic number 62, a hard silvery-white metal of the lanthanide series.
For undergraduate chemistry it was required that one could recite the whole thing from memory, to know that iridium lies at the foot of cobalt, that europium is sandwiched between samarium and gadolinium.

Đặt câu với từ "samarium"

Dưới đây là những mẫu câu có chứa từ "samarium", trong bộ từ điển Từ điển Tiếng Anh. Chúng ta có thể tham khảo những mẫu câu này để đặt câu trong tình huống cần đặt câu với từ samarium, hoặc tham khảo ngữ cảnh sử dụng từ samarium trong bộ từ điển Từ điển Tiếng Anh

1. Naturally occurring samarium has a radioactivity of 128 Bq/g.

2. Sir, our stockpiles of samarium will only last another two months at most.

3. If samarium prices don't reduce, the market will have no choice but to compensate.

4. He developed the X-ray fluorescence analytical method, and discovered the samarium alpha-ray.

5. In its elemental form, samarium is used in the nuclear industry as a neutron absorber.

6. Samarium oxide can sometimes be found in sunglasses and glass filters to increase infrared absorption.

7. Made of any of the following magnetic materials: aluminium-nickel-cobalt, ferrites, samarium-cobalt, or neodymium-iron-boron.

8. We stockpile samarium for defense purposes, of course, and quietly sell what we don't need to our friends in nuclear energy.

9. The metal is often prepared by electrolysis of a molten mixture of samarium(III) chloride with sodium chloride or calcium chloride.

10. Homogeneous catalytic hydrogenation was not successful, but samarium diiodide did effectively and selectively cleave one of the N—O bonds in a number of nitroso acetals.

11. The magnets (16) are samarium cobalt (SmCo) or alnico permanent magnets having a Curie point exceeding the operating temperature of the mold (400-500 °C).

12. Complexometric determinations of praseodymium, neodymium and samarium as representative members of the rare earths with Alizarin Red S, Thoron, and Murexide as ohelatochrome indicators have been investigated.

13. 151Eu is the beta decay product of samarium-151, but since this has a long decay half-life and short mean time to neutron absorption, most 151Sm instead ends up as 152Sm.