Chemical Bonds and the Properties of Water

By physical force

By chemical bonds

By magnetic attraction

By gravitational pull

Molecules are always compounds, and compounds are always molecules.

Molecules are groups of atoms held together, while compounds are molecules with more than one type of element, such as H2O.

Molecules are made of different elements, while compounds are made of the same element.

Molecules and compounds are both single atoms.

It gains an electron to become Na+

It loses an electron to become Na+

It gains a proton to become Na+

It loses a neutron to become Na+

It loses an electron

It gains a proton

It gains an electron

It loses a neutron

They result in no net charge and satisfy the octet rule

They always result in a positive charge

They only occur between different elements

They involve the transfer of electrons

Atoms of the same element or a different element

Only atoms of the same element

Only atoms of different elements

Only metals

Two atoms share two pairs of electrons

Two atoms share one pair of electrons

Two atoms share three pairs of electrons

Two atoms transfer two electrons

H₂ (hydrogen gas)

O₂ (oxygen gas)

N₂ (nitrogen gas)

CO₂ (carbon dioxide)

They dictate how electrons are distributed in covalent bonds

They determine the color of the atom

They change the number of protons in the atom

They affect the melting point of the atom

It is strong and permanent.

It is weak and transitory.

It is only found in metals.

It is stronger than covalent bonds.