chem

How many pairs of unshared electrons for the nitrogen atom are in the ammonia molecule NH₃?

• 1

• 2

• 3

• 4

How many bonded pairs of electrons for the nitrogen atom are in the ammonia molecule NH₃?

• 1

• 2

• 3

• 4

How many pairs of unshared electrons for the carbon atom are in the methane molecule Ch₄?

• 4

• 0

• 2

• 1

How many bonded pairs of foe the carbon atom are in the methane molecule CH₄?

• 4

• 0

• 2

• 1

How many pairs of Unshared electrons for the oxygen atom are in the water molecule H₂O?

• 1

• 2

• 3

• 4

How many bonded pairs of electrons for the oxygen atom are in the water molecule H₂O?

• 1

• 2

• 3

• 4

Which of the following elements does NOT exists as a diatomic molecules?

• 
• 
• 
• 

How many sigma bonds ( σ ) and pi bonds ( π ) are in ethene molecules C₂H₄ structures shown down?

• 5 sigma and 1 pi

• 4 sigma and 1 pi

• 5 sigma and 2 pi

• 4 sigma and 2 pi

How many sigma bonds ( σ ) and pi bonds ( π ) are in ethene molecules C₄H₆ structures shown down?

• 9 sigma and 1 pi

• 4 sigma and 1 pi

• 9 sigma and 2 pi

• 4 sigma and 2 pi

How many sigma bonds ( σ ) and pi bonds ( π ) are in ethene molecules C₄H₆ structures shown down?

• 5 sigma and 2 pi

• 7 sigma and 1 pi

• 5 sigma and 2 pi

• 8 sigma and 1 pi