Ch 3: Elements, atoms, ions, and the periodic table

•Question 3.2 plus a few others:

• the symbol of the noble gas in period 3

• the lightest element in Group IVA

• the only metalloid in Group IIIA

• the element whose atoms contain 18 protons

• the element in period 5, Group VIIA

•Give the name, atomic number and atomic mass for Mg

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