barium
英 ['beərɪəm]
美 ['bɛrɪəm]
barium 钡来自词根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
