Covalent Bonds

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.

Which is most likely a covalent compound?

CF4

Prefix for two

Di-

Prefix for one

Mono-

Which is most likely a covalent compound?

NH3

Prefix for five

Penta-

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.

Prefix for 6

Hexa-

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.

Prefix for four

Tetra-

Prefix for three

Tri-

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.

After a covalent bond has stabilized an atom, the atom will have

a full valence electron shell.

Covalent compounds are usually described as .

brittle

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

carbon (C) hydrogen (H) iodine (I) nitrogen (N)

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 bonds can be best described as

neutral atoms coming together to share electrons.

Covalent bonds are formed between

nonmetals

Covalent compounds _ conduct electricity well.

rarely

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