They have the same atomic number and hence nearly identical chemical behaviour but different atomic masses.

它们有相同的原子序数，因此化学行为几乎完全一样，但原子量不同。

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This paper studies corrosion and electro-chemical behaviour of steel in the two-phase system of petroleum hydro Caron and oil field Water.

本文研究了石油烃——油田水的两相体系中钢的腐蚀及电化学行为。

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With scandium and yttrium they make up the rare earth metals. their atoms have similar configurations and similar physical and chemical behaviour; the most common valences are3and4

加上钪和钇，一起组成稀土金属。它们的原子都有相似的配置，以及相似的物理和化学行为，最常见的原子价是3和4。

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Down at these near-atomic sizes, materials exhibit unique properties that dramatically alter their physical, chemical or biological behaviour.

ECONOMIST: The dulling of nanotech��s silver lining

Their theory is that smokers smoke because their brains have high levels of dopamine, a brain chemical believed to stimulate addictive behaviour.

BBC: Smokers and drinkers 'protected against Parkinson's'

One compound synthesised by Dr Blackwell's team is more effective than the natural signalling chemical at turning on this group behaviour and works even when there are not enough bacteria around to induce the process naturally.

ECONOMIST: Novel antibiotics