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高考网
26 天
2025年高考化学物质、现象的颜色汇总
(1)镁在空气中燃烧产生耀眼的强光,生成白色固体MgO。 (2)铁丝在O2中剧烈燃烧、火星四射、生成黑色固体Fe3O4。 (3)硫在空气中燃烧呈微弱的淡蓝色火焰,硫在氧气中燃烧呈明亮的蓝紫色火焰。H2、CO、CH4燃烧呈蓝色火焰。 (4)磷在空气中燃烧生成大量白烟。 (二 ...
来自MSN
2 天
铁:核炉最后的灰烬
今天我们要讨论的是一种原子核中有26个质子的化学元素。这是铁(Fe)。在自然界中发现了这种金属的 4 种稳定同位素和几十种不稳定同位素。 但这些铁是从哪里来的呢?
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