Chemistry 0620 · IGCSE · Arrangement of elements

Arrangement of elements — practice question

The Periodic Table contains every known element. Elements are arranged in order of ...... 1 ...... number. The melting points of Group I elements ...... 2 ...... down the group. The melting points of Group VII elements ...... 3 ...... down the group. Which words correctly fill gaps 1, 2 and 3?

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