What is the main challenge in determining the oxidation number of boron in BH3?

Electronegativity and Oxidation States

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Chemistry
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9th - 10th Grade
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Hard

Olivia Brooks
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8 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Boron is a noble gas.
Boron is a non-metal.
Boron is a metal.
Boron is a metalloid.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the typical oxidation state of hydrogen when bonded with non-metals?
0
+1
-1
+2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why can't the usual rule for hydrogen's oxidation state be easily applied to boron?
Boron is a metal.
Boron is a metalloid.
Boron is a noble gas.
Boron is a halogen.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which element is more electronegative, boron or hydrogen?
Boron
Hydrogen
They have the same electronegativity
It depends on the compound
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the electronegativity value of hydrogen?
2.20
3.00
1.00
2.04
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How many electrons does hydrogen gain when bonded to boron?
One electron
Two electrons
No electrons
Three electrons
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the oxidation state of boron in BH3?
+1
+2
0
+3
8.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do the oxidation numbers of hydrogen and boron in BH3 add up?
They add up to -1
They add up to 0
They add up to +1
They add up to +3
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