• n. [化学] 钡（一种化学元素）

来自词根bar, 重，同gravity, 重力。因该金属元素在同类金属中相对较重而命名。

barium

barium: see gravity

barium (n.)

1808, coined in Modern Latin by its discoverer, English chemist Sir Humphrey Davy (1778-1829), because it was present in the mineral barytes "heavy spar" (barium sulphate), so named by Lavoisier from Greek barys "heavy," from PIE root *gwere- (2) "heavy" (see grave (adj.)). The metal is actually relatively light.

1. Explain why barium forms peroxide but beryllium does not.

解释为什么钡能形成过氧化物而铍则不能。

来自辞典例句

2. Common ceramic elements are barium titanate and lead zirconate - titanate.

普通的陶瓷元件分别是钛酸钡和锆钛酸铅.

来自辞典例句

3. There is reflux of barium into the terminal ileum.

钡剂反流进入回肠末端.

来自辞典例句

4. Barium is found in some oilfield brines in concentrations greater than 100 mg / litre.

在有些油田卤水中,钡的浓度大于100毫克/升.

来自辞典例句

5. Diagnosis can usually be made by barium swallow and tracheogram.

确诊要靠钡餐和气管造影.

来自辞典例句