The element with atomic number 12 belongs to period 3 of the periodic table, True of False ?

The element with atomic number 12 belongs to period 3 of the periodic table, True or False ?

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Helium is not a member of noble gases because it has two electrons in its outer shell, True of False ? - Classloaded.com
8 days ago

[…] is not a member of noble gases because it has two electrons in its outer shell, True of False […]

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Which of the letters indicate an alkaline earth metal and a noble gas respectively ? - Classloaded.com
8 days ago

[…] of the letters indicate an alkaline earth metal and a noble gas respectively […]