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MATTER - PROPERTIES AND TRANSFORMATION: Periodic table - Families of elements and Relative reactivity
What is the common name for the elements in Group 18 of the periodic table?

The first 20 elements of the periodic table cover how many periods?

The most common state of matter for elements in Group 18 (Noble Gases) at standard temperature and pressure is:
Among the first 20 elements, which is the most reactive non-metal (excluding noble gases)?
Which of the following is a characteristic property of metals?