Sodium is a common element found in table salt. What is the symbol for sodium? A. Na B. K C. Mg D. Ca 相关知识点: 试题来源: 解析 A。本题考查钠的英文符号。选项 B 是钾的符号,选项 C 是镁的符号,选项 D 是钙的符号。只有选项 A 是钠的符号。
Na: This represents Sodium, commonly found in table salt. Mg: This is the symbol for Magnesium, a lightweight metal critical in biological systems. Al: This represents Aluminum, a lightweight and corrosion-resistant metal. Si: This ...
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the atomic mass of an element can be described as the total mass of one atom of the given element. its unit is called the unified atomic mass unit and is denoted by the symbol ‘u’. standard atomic weight is used to give the value of the mean of the atomic masses in a mixture of...
Each chemical element has been given a name and a distinctive symbol. For most elements the symbol is simply the abbreviated form of the English name consisting of one or two letters, for example: 元素这个术语指的是仅仅由同一种类的原子组成的物质。对化学家(化学工作者)来说,原子的种类 由原子...
-1 represents an element, which is 1 standard deviation less than the mean; a z-score equal to -2 signifies 2 standard deviations less than the mean; etc. if the number of elements in the set is large, about 68% of the elements have a z-score between -1 and 1; about 95% have ...
Healthy table salt flavouring trace element additive capable of resisting iodine sublimation, preparing method and use thereofdoi:CN1050979 C一种抗碘升华和微量元素保健食盐调味品添加剂及制造方法,以甘油保护碘素,以锌,硒,锶,锗化合物来补充人体特别是中老年人易缺乏的微量元素,从而有效防止碘损失,扩大调味品...
The multicomponent compound nutrient salt contains sodium chloride NaCl, and is characterized by that said nutrient salt is made up NaCl mixed with KCl, CaCO3, MgSO4, Na2Se2O4 and KIO3. As compared with general salt it possesses the functions of "limiting sodium, supplementing potassiun, ...