25 Questions
In the Lewis structures provided, which molecule has a central atom that lacks an octet?
CHO2⁻
How many lone pairs of electrons does the nitrogen atom have in the Lewis structure of NO⁺?
None
Which molecule has all outer atoms with octets in the provided Lewis structures?
OF2
How many electrons are placed on the central atom in OF2 after Step 3?
4
Which molecule has a nitrogen atom single bonded to an oxygen atom in its Lewis structure?
NH3
What is the total number of valence electrons in acetylene (HCCH)?
10
Which molecule contains a carbon atom double bonded to an oxygen atom in its Lewis structure?
HCCH
What is the charge on the CHO2⁻ ion based on its Lewis structure?
-1
How many lone pairs of electrons does the central oxygen atom have in OF2?
One
For which molecule, based on their Lewis structures, is it mentioned that nothing changes because each atom has an octet as drawn?
SiH4
Which molecule, based on the Lewis structures provided, has a carbon atom with a single bond to two oxygen atoms, each with three lone pairs of electrons?
HCCH
How many valence electrons are there in the Lewis structure of acetylene (HCCH) after Step 1 of the solution?
10
In the Lewis structure of NH3, how many lone pairs of electrons does the nitrogen atom have?
3
For which molecule, based on its Lewis structures, is it mentioned that we must move another pair of electrons to form a triple bond?
NH3
Which molecule's Lewis structure shows a nitrogen atom double bonded to an oxygen atom?
HCCH
How many lone pairs of electrons does the central oxygen atom have in the Lewis structure of OF2?
1
In the Lewis structure of SiH4, how many outer atoms have octets as drawn?
4
For which molecule, based on the Lewis structures provided, is it mentioned that Si already has an octet, so nothing needs to be done?
SiH4
'NO+' mentions that neither atom has an octet and we must move electrons to form a multiple bond. How many valence electrons did we add for this ion?
$8$
In the Lewis structure of HCN, how many lone pairs of electrons does the carbon atom have?
1
What is the total number of valence electrons in the Lewis structure of ammonia (NH3)?
8
In the Lewis structure of H3CCH3, how many total valence electrons are present after Step 1 of the solution?
14
How many lone pairs of electrons does the nitrogen atom have in the Lewis structure of HCN?
0
Which molecule, based on its Lewis structure, requires moving electrons to form a triple bond in order to achieve octets?
NO+
In the Lewis structure of HCCH, how many lone pairs of electrons does the central carbon atom have?
0
This quiz focuses on identifying and understanding covalent bonding structures such as ammonia, water, and hydrogen fluoride. It involves recognizing the number of covalent bonds and lone pairs in each molecule based on Lewis structures.
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