Questionnaire 1 Chem (10th)

What is H (hydrogen) oxidation state?

• +1

• +2

• +3

What is O (oxygen) oxidation state?

• -2

• -3

• -4

Which family does K (potassium) belong to?

• I A

• II A

• III A

Which family does C (carbon) belong to?

• IV A

• V A

• VI A

The algebraic sum of oxidation states for all atoms in a neutral molecule is zero.

• True

• False

What is Na (sodium) oxidation state?

• +1

• +2

• +3

What is the oxidation state of Pb in PbO ?

• +3

• +2

• +5

What is the oxidation state of C in CO₂ ?

• +3

• +4

• +5

What is Ca (calcium) oxidation state?

• +3

• +2

• +1

Explain why the periodic table is divided in families?