Question

why do atoms carry out covalent bonding?

they bond together because they need more neutrons in order to be balanced.
they bond because they need more protons.
their outer shell is not full which cause them to be unstable.
they have to carry out covalent bonding to survive.

question 3
0.5 pts
which element shown in the video is a single bonded element?
oxygen

Explanation:

Question 1 (Why do atoms carry out covalent bonding?)

• Option 1: Covalent bonding is not about neutrons (neutrons are in the nucleus, bonding involves electrons), so incorrect.
• Option 2: Protons are in the nucleus and determine the element, not covalent bonding (which involves electrons), so incorrect.
• Option 3: Atoms form covalent bonds because their outermost electron shell is incomplete (unstable), so they share electrons to fill it, this is correct.
• Option 4: Atoms don't "need" to bond to "survive" (a non - scientific description), so incorrect.

Answer:

The correct option is: Their outer shell is not full which cause them to be unstable.

Question 3 (Which element shown in the video is a single bonded element? - Note: Since the video content is not provided, but based on general chemistry knowledge, common single - bonded elements in simple cases could be Hydrogen (H₂ has a single bond), Chlorine (Cl₂ has a single bond), etc. If Oxygen was an option, Oxygen (O₂) has a double bond (O = O), so if the options included Hydrogen or Chlorine (assuming the video showed such), but with the given partial option (Oxygen is likely not the answer as O₂ is double - bonded). However, with the limited info, if we assume the intended correct answer based on typical questions, and if the video showed Hydrogen (H₂) or another single - bonded diatomic molecule, but since the user's provided options for Q3 are partial, we can only note that Oxygen is not single - bonded (O₂ is double - bonded). If we had to choose from common single - bonded elements, Hydrogen (H₂) is single - bonded. But based on the given partial Q3, we can't fully answer without video details, but for the first question, we have the answer as above.