Covalent Bonds

• Covalent bonds are formed between

  nonmetals
• Why can a hydrogen atom form a covalent bond without fulfilling the octet rule?

  Hydrogen's valence shell can hold only up to two electrons.
• After a covalent bond has stabilized an atom, the atom will have

  a full valence electron shell.
• What best explains how two oxygen atoms, each with six valence electrons, can bond with each other?

  Each atom can share two electrons with the other so that each atom has eight valence electrons.See an expert-written answer!We have an expert-written solution to this problem!
• What best explains whether bromine (Br) or neon (Ne) is more likely to form a covalent bond?

  Bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule.See an expert-written answer!We have an expert-written solution to this problem!

  
• The compound cyanogen (CN)2 has covalent bonds shown in this diagram. How many electrons are shared between one nitrogen atom and one carbon atom?

  six

  
• The compound ethylene (C2H4) is represented by this diagram. What statement best describes the arrangement of the atoms in an ethylene molecule?

  Two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atoms.

  
• Covalent bonds can be best described as

  neutral atoms coming together to share electrons.
• Phosphorous (P) and chlorine (Cl) bond covalently. Which diagram shows how the covalent bonds most likely form in a phosphorous trichloride molecule?

  
• In carbon dioxide (CO2), there are two oxygen atoms for each carbon atom. Each oxygen atom forms a double bond with carbon, so the molecule is formed by two double bonds sharing ________________

  eight electrons.
• Covalent compounds are usually described as .

  brittle
• Covalent compounds _ conduct electricity well.

  rarely
• Which is most likely a covalent compound?

  CF4
• Which is most likely a covalent compound?

  NH3
• Which elements can join with other elements to form covalent bonds? Check all that apply.

  carbon (C)

  hydrogen (H)

  iodine (I)

  nitrogen (N)
• Prefix for two


  Di-
• Prefix for three


  Tri-
• Prefix for one


  Mono-
• Prefix for four


  Tetra-
• Prefix for five


  Penta-
• Prefix for 6


  Hexa-