A student is asked to complete two sentences.
Metallic and non-metallic elements are classified in the ……1……. This can be used to ……2…… the properties of elements.
Which words correctly complete the gaps?
1 )
gap 1: Periodic Table / gap 2: measure
gap 1: Periodic Table / gap 2: predict
3 )
gap 1: reactivity series / gap 2: measure
4 )
gap 1: reactivity series / gap 2: predict
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