Periodic Table

Which one is Nitrogen's electron configuration?

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What's true for sodium's (₁₁Na) electron configuration?

• Na has 11 valence electrons

• Na is in the second period

• Na has 3 shells

• Na has 3 closed shells

Who produced one of the first practical periodic tables in 1869?

• Dmitri Mendeleev

• John Dalton

• Marie Curie

• Niels Bohr

What is the main characteristic of a period in the periodic table?

• It contains only non-metals.

• It contains only metals.

• It runs horizontally.

• It runs vertically.

Which group in the periodic table is known as the noble gases?

• Group VII A/Group 17

• Group VIII A /Group 18

• Group II A/Group 2

• Group I A/Group 1

Which of the following elements is a metalloid?

• Sodium

• Oxygen

• Gold

• Silicon

How do we call Group III A/ Group 13?

• Alkali metals

• Alkaline earth metals

• Earth metals

• Carbon-group

In which block can we find Lithium (₃Li)?

• s-block

• p-block

• d-block

• f-block