16 Questions
What is the electron configuration of copper?
[Ar] 3d10 4s1
In which group of the Periodic Table is copper placed?
Group 1B
How many valence electrons does copper have?
1
What are the two oxidation states commonly exhibited by copper?
1+ and 2+
Which ion of copper is generally more stable and commonly observed as a stable salt?
Cu (II)
What color does a sample of copper (I) chloride remain if not exposed to air?
White
What happens to the color of copper (I) chloride when exposed to air?
It changes from white to green
What is the chemical reaction for the reduction of Cu (II) to Cu (I)?
2Cu2+ (aq) + 2Cl- (aq) + SO32- (aq) + H2O (l) 2CuCl(s) + SO42- (aq) + 2H+ (aq)
What is the electron configuration of copper?
[Ar] 3d10 4s1
What group of the Periodic Table was copper originally placed in according to Mendeleev's original Periodic Table?
Group 1A
What are the two oxidation states commonly exhibited by copper?
1+ and 2+
What is the color of copper (I) chloride when not exposed to air?
White
Which oxidation state of copper is generally more stable and commonly observed as a stable salt?
Cu (II)
What is the chemical reaction for the reduction of Cu (II) to Cu (I)?
2Cu2+ (aq) + 2Cl- (aq) + SO32- (aq) + H2O (l) => 2CuCl(s) + SO42- (aq) + 2H+ (aq)
What is the stability of copper (I) chloride when exposed to air?
Less stable
What happens to some metals in low oxidation states when exposed to air?
Spontaneously ignites
Test your knowledge on the preparation of copper(I) chloride and the electron configuration of copper. Explore the relationship between copper's placement in the Periodic Table and its single valence electron.
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