您要查找的是不是：
- Because a radioactive form of argon is produced by decay of a naturally occurring radioactive potassium isotope, it can be used to date rocks and samples more than 100,000 years old. 因为它是稀有天然放射性同位素钾衰变而产生的，所以可以用来测定十万年以上的岩石年龄和采样。
- No potassium did we find in this mineral. 在这种矿石中我们没有发现钾。
- Potassium isotope 钾同位素
- A radioactive isotope of carbon, especially carbon 14. 放射性碳碳的一种放射性同位素，尤指碳14。
- Because a radioactive form of argon is produced by decay of a naturally occurring radioactive potassium isotope, it can be used to date rocks and samples more than 100,000 years old. " 因为它是稀有天然放射性同位素钾衰变而产生的，所以可以用来测定十万年以上的岩石年龄和采样。
- Potassium is necessary to the existence of all living things. 钾是所有生物生存必须的。
- The symbol for the isotope deuterium. 氘的化学符号同位素氘的符号
- The components of a potassium cycle vary greatly. 钾素循环的各个环节有很大的变化。
- Its most common form, or isotope, has 146 neutrons. 它最常见的形式或者同位素有146个中子。
- IS ~(40)Ca_(20) A STABLE ISOTOPE? ~(40)Ca_(20)是否稳定?
- Simmons: Get me a sample and some isotope readings. 弄些样本和同位素读数。
- Isotope shifts and hyperfine structure spectrum[J]. 引用该论文 马洪良.
- RECENT DEVELOPMENT OF POTASSIUM CARBONATE INDUSTRY. 碳酸钾工业发展近况。
- In this case, the ion is potassium. 这里的离子指的是钾离子。
- HIGHLY IONIZED POTASSIUM AND CALCIUM SPECTRA. 高度游离钾及钙之光谱(英文)
- Potassium One of the essential elements in plants. 钾：植物体的必需元素之一。
- What fruit vegetable contains potassium most? 什么水果蔬菜含钾最多？
- Potassium methoxide, 0.1 N Solution in Toluene/... 甲醇钾0.;1N溶液甲苯/甲醇混合溶剂；
- Changes of nuclear mass and nuclear size cause isotope shifts. 原子核质量和大小的不同引起同位素移动。
- Kx Potassium salt of Amino Trimethylene ... 氨基三甲叉膦酸钾 ATMP&%238226；
