chemistry of water

The chemical formula of water is

• HO

• H₂O

• H₃O

• HO₂

Because water is made of two nonmetals it is

• an ionic bond

• a nonpolar covalent bond

• a polar covalent bond

• a metallic bond

A polar bond means the outer electrons

• are transferred from the oxygen to the hydrogen

• are transferred from the hydrogen to the oxygen

• are evenly shared

• are unevenly shared with oxygen getting the electrons more

• are unevenly shared with hydrogen getting the electrons more

The Hydrogen and oxygen in a water molecule are held together by this type of bond

• Ionic

• Non polar covalent

• Hydrogen

• Polar covalent

water molecules are held together by this type of bond

• Ionic

• Non polar covalent

• Hydrogen

• Polar covalent

The property of water molecules being attracted to other water molecules is called _________.

• cohesion

• adhesion

• Density

• Polarity

The property of water molecules being attracted to other substances is called _________.

• cohesion

• adhesion

• Density

• Polarity

A water strider can skate along the top of a pond because:

• it is a strong ionic bond

• hydrogen bonds result in water cohesion ( high surface tension)

• water striders have adapted to take advantage of water adhesion

• low surface tension of water

Water has a a very low mass, which is usually means the substance is a gas. Why is water a liquid at room temperature

• It contains only three atoms.

• It is a small, covalent molecule.

• It contains oxygen.

• It can form hydrogen bonds.

What does temperature mean

• how heavy the atoms are

• how many atoms are in a substance

• have fast the atoms are moving

• how hot or cold something is compared to your skin.