Protons are nearly 2000 times as heavy as electrons.質(zhì)子的質(zhì)量幾乎是電子的2,000倍。The neutrons and protons form the core of the atom.中子和質(zhì)子構(gòu)成了原子核.Electrons are negatively charged with electricity, protons are positively charged.電子是帶負(fù)...
The water was reacting with the ferrous iron in the tank.水與水箱中的鐵質(zhì)產(chǎn)生化學(xué)反應(yīng).Nodules contain a mixture of ferrous and ferrous - oxy leghemoglobin.根瘤含有亞鐵和亞鐵一氧化豆血紅蛋白的混合物.Ferrous metals , timber, and pulp seem to offer the main ...